Method and device for determining priority of UL transmission in NR V2X

ABSTRACT

A method for performing wireless communication by a first device, and a device for supporting same are provided. The method may comprise: transmitting, to a second device, at least one physical sidelink control channel (PSCCH) and at least one physical sidelink shared channel (PSSCH) related to the at least one PSCCH; receiving, from the second device, at least one sidelink (SL) hybrid automatic repeat request (HARQ) feedback information through at least one physical sidelink feedback channel (PSFCH) related to the at least one PSSCH; and determining a priority value of physical uplink control channel (PUCCH) transmission for reporting the at least one SL HARQ feedback information to a base station, based on at least one priority value of the at least one SL HARQ feedback information.

This application is the Continuation Bypass of International ApplicationNo. PCT/KR2020/013542, filed on Oct. 6, 2020, which claims the benefitof U.S. Provisional Application No. 62/911,359, filed on Oct. 6, 2019,the contents of which are all hereby incorporated by reference herein intheir entirety.

BACKGROUND OF THE DISCLOSURE Field of the Disclosure

This disclosure relates to a wireless communication system.

Related Art

Sidelink (SL) communication is a communication scheme in which a directlink is established between User Equipments (UEs) and the UEs exchangevoice and data directly with each other without intervention of anevolved Node B (eNB). SL communication is under consideration as asolution to the overhead of an eNB caused by rapidly increasing datatraffic.

Vehicle-to-everything (V2X) refers to a communication technology throughwhich a vehicle exchanges information with another vehicle, apedestrian, an object having an infrastructure (or infra) establishedtherein, and so on. The V2X may be divided into 4 types, such asvehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I),vehicle-to-network (V2N), and vehicle-to-pedestrian (V2P). The V2Xcommunication may be provided via a PC5 interface and/or Uu interface.

Meanwhile, as a wider range of communication devices require largercommunication capacities, the need for mobile broadband communicationthat is more enhanced than the existing Radio Access Technology (RAT) isrising. Accordingly, discussions are made on services and user equipment(UE) that are sensitive to reliability and latency. And, a nextgeneration radio access technology that is based on the enhanced mobilebroadband communication, massive Machine Type Communication (MTC),Ultra-Reliable and Low Latency Communication (URLLC), and so on, may bereferred to as a new radio access technology (RAT) or new radio (NR).Herein, the NR may also support vehicle-to-everything (V2X)communication.

FIG. 1 is a drawing for describing V2X communication based on NR,compared to V2X communication based on RAT used before NR. Theembodiment of FIG. 1 may be combined with various embodiments of thepresent disclosure.

Regarding V2X communication, a scheme of providing a safety service,based on a V2X message such as Basic Safety Message (BSM), CooperativeAwareness Message (CAM), and Decentralized Environmental NotificationMessage (DENM) is focused in the discussion on the RAT used before theNR. The V2X message may include position information, dynamicinformation, attribute information, or the like. For example, a UE maytransmit a periodic message type CAM and/or an event triggered messagetype DENM to another UE.

For example, the CAM may include dynamic state information of thevehicle such as direction and speed, static data of the vehicle such asa size, and basic vehicle information such as an exterior illuminationstate, route details, or the like. For example, the UE may broadcast theCAM, and latency of the CAM may be less than 100 ms. For example, the UEmay generate the DENM and transmit it to another UE in an unexpectedsituation such as a vehicle breakdown, accident, or the like. Forexample, all vehicles within a transmission range of the UE may receivethe CAM and/or the DENM. In this case, the DENM may have a higherpriority than the CAM.

Thereafter, regarding V2X communication, various V2X scenarios areproposed in NR. For example, the various V2X scenarios may includevehicle platooning, advanced driving, extended sensors, remote driving,or the like.

For example, based on the vehicle platooning, vehicles may move togetherby dynamically forming a group. For example, in order to perform platoonoperations based on the vehicle platooning, the vehicles belonging tothe group may receive periodic data from a leading vehicle. For example,the vehicles belonging to the group may decrease or increase an intervalbetween the vehicles by using the periodic data.

For example, based on the advanced driving, the vehicle may besemi-automated or fully automated. For example, each vehicle may adjusttrajectories or maneuvers, based on data obtained from a local sensor ofa proximity vehicle and/or a proximity logical entity. In addition, forexample, each vehicle may share driving intention with proximityvehicles.

For example, based on the extended sensors, raw data, processed data, orlive video data obtained through the local sensors may be exchangedbetween a vehicle, a logical entity, a UE of pedestrians, and/or a V2Xapplication server. Therefore, for example, the vehicle may recognize amore improved environment than an environment in which a self-sensor isused for detection.

For example, based on the remote driving, for a person who cannot driveor a remote vehicle in a dangerous environment, a remote driver or a V2Xapplication may operate or control the remote vehicle. For example, if aroute is predictable such as public transportation, cloud computingbased driving may be used for the operation or control of the remotevehicle.

In addition, for example, an access for a cloud-based back-end serviceplatform may be considered for the remote driving.

Meanwhile, a scheme of specifying service requirements for various V2Xscenarios such as vehicle platooning, advanced driving, extendedsensors, remote driving, or the like is discussed in NR-based V2Xcommunication.

SUMMARY OF THE DISCLOSURE Technical Objects

Meanwhile, a UE may report SL HARQ feedback information to a basestation through a PUCCH. In this case, the UE needs to determine apriority of PUCCH transmission.

Technical Solutions

In one embodiment, a method for performing wireless communication by afirst device is provided. The method may comprise: transmitting, to asecond device, at least one physical sidelink control channel (PSCCH)and at least one physical sidelink shared channel (PSSCH) related to theat least one PSCCH; receiving, from the second device, at least onesidelink (SL) hybrid automatic repeat request (HARQ) feedbackinformation through at least one physical sidelink feedback channel(PSFCH) related to the at least one PSSCH; and determining a priorityvalue of physical uplink control channel (PUCCH) transmission forreporting the at least one SL HARQ feedback information to a basestation, based on at least one priority value of the at least one SLHARQ feedback information.

In one embodiment, a first device configured to perform wirelesscommunication is provided. The first device may comprise: one or morememories storing instructions; one or more transceivers; and one or moreprocessors connected to the one or more memories and the one or moretransceivers. For example, the one or more processors may execute theinstructions to: transmit, to a second device, at least one physicalsidelink control channel (PSCCH) and at least one physical sidelinkshared channel (PSSCH) related to the at least one PSCCH; receive, fromthe second device, at least one sidelink (SL) hybrid automatic repeatrequest (HARQ) feedback information through at least one physicalsidelink feedback channel (PSFCH) related to the at least one PSSCH; anddetermine a priority value of physical uplink control channel (PUCCH)transmission for reporting the at least one SL HARQ feedback informationto a base station, based on at least one priority value of the at leastone SL HARQ feedback information.

Effects of the Disclosure

The user equipment (UE) may efficiently perform SL communication.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a drawing for describing V2X communication based on NR,compared to V2X communication based on RAT used before NR.

FIG. 2 shows a structure of an NR system, based on an embodiment of thepresent disclosure.

FIG. 3 shows a functional division between an NG-RAN and a 5GC, based onan embodiment of the present disclosure.

FIG. 4 shows a radio protocol architecture, based on an embodiment ofthe present disclosure.

FIG. 5 shows a structure of an NR system, based on an embodiment of thepresent disclosure.

FIG. 6 shows a structure of a slot of an NR frame, based on anembodiment of the present disclosure.

FIG. 7 shows an example of a BWP, based on an embodiment of the presentdisclosure.

FIG. 8 shows a radio protocol architecture for a SL communication, basedon an embodiment of the present disclosure.

FIG. 9 shows a UE performing V2X or SL communication, based on anembodiment of the present disclosure.

FIG. 10 shows a procedure of performing V2X or SL communication by a UEbased on a transmission mode, based on an embodiment of the presentdisclosure.

FIG. 11 shows three cast types, based on an embodiment of the presentdisclosure.

FIG. 12 shows a synchronization source or synchronization reference ofV2X, based on an embodiment of the present disclosure.

FIG. 13 shows a resource unit for CBR measurement, based on anembodiment of the present disclosure.

FIG. 14 shows a procedure in which a UE performs channel transmissionand/or channel reception based on a priority, based on an embodiment ofthe present disclosure.

FIG. 15 shows a procedure for a TX UE to report SL HARQ feedbackinformation to a base station, based on an embodiment of the presentdisclosure.

FIG. 16 shows an example of CG type 1 or CG type 2-based resourceallocation, based on an embodiment of the present disclosure.

FIG. 17 shows a procedure for a TX UE to report SL HARQ feedbackinformation to a base station, based on an embodiment of the presentdisclosure.

FIG. 18 shows a procedure for a TX UE to report SL HARQ feedbackinformation to a base station, based on an embodiment of the presentdisclosure.

FIG. 19 shows a method for a TX UE to report SL HARQ feedbackinformation to a base station if the TX UE does not perform SLtransmission by using resource(s) within a specific period, based on anembodiment of the present disclosure.

FIG. 20 shows a method for a first device to perform power controlrelated to channel transmission, based on an embodiment of the presentdisclosure.

FIG. 21 shows a method for a base station to receive information on SLHARQ feedback, based on an embodiment of the present disclosure.

FIG. 22 shows a method for a first device to perform wirelesscommunication, based on an embodiment of the present disclosure.

FIG. 23 shows a method for a base station to perform wirelesscommunication, based on an embodiment of the present disclosure.

FIG. 24 shows a method for a first device to perform wirelesscommunication, based on an embodiment of the present disclosure.

FIG. 25 shows a method for a base station to perform wirelesscommunication, based on an embodiment of the present disclosure.

FIG. 26 shows a method for a first device to perform wirelesscommunication, based on an embodiment of the present disclosure.

FIG. 27 shows a method for a base station to perform wirelesscommunication, based on an embodiment of the present disclosure.

FIG. 28 shows a communication system 1, based on an embodiment of thepresent disclosure.

FIG. 29 shows wireless devices, based on an embodiment of the presentdisclosure.

FIG. 30 shows a signal process circuit for a transmission signal, basedon an embodiment of the present disclosure.

FIG. 31 shows another example of a wireless device, based on anembodiment of the present disclosure.

FIG. 32 shows a hand-held device, based on an embodiment of the presentdisclosure.

FIG. 33 shows a vehicle or an autonomous vehicle, based on an embodimentof the present disclosure.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

In the present disclosure, “A or B” may mean “only A”, “only B” or “bothA and B.” In other words, in the present disclosure, “A or B” may beinterpreted as “A and/or B”. For example, in the present disclosure, “A,B, or C” may mean “only A”, “only B”, “only C”, or “any combination ofA, B, C”.

A slash (/) or comma used in the present disclosure may mean “and/or”.For example, “A/B” may mean “A and/or B”. Accordingly, “A/B” may mean“only A”, “only B”, or “both A and B”. For example, “A, B, C” may mean“A, B, or C”.

In the present disclosure, “at least one of A and B” may mean “only A”,“only B”, or “both A and B”. In addition, in the present disclosure, theexpression “at least one of A or B” or “at least one of A and/or B” maybe interpreted as “at least one of A and B”.

In addition, in the present disclosure, “at least one of A, B, and C”may mean “only A”, “only B”, “only C”, or “any combination of A, B, andC”. In addition, “at least one of A, B, or C” or “at least one of A, B,and/or C” may mean “at least one of A, B, and C”.

In addition, a parenthesis used in the present disclosure may mean “forexample”. Specifically, when indicated as “control information (PDCCH)”,it may mean that “PDCCH” is proposed as an example of the “controlinformation”. In other words, the “control information” of the presentdisclosure is not limited to “PDCCH”, and “PDCCH” may be proposed as anexample of the “control information”. In addition, when indicated as“control information (i.e., PDCCH)”, it may also mean that “PDCCH” isproposed as an example of the “control information”.

A technical feature described individually in one figure in the presentdisclosure may be individually implemented, or may be simultaneouslyimplemented.

The technology described below may be used in various wirelesscommunication systems such as code division multiple access (CDMA),frequency division multiple access (FDMA), time division multiple access(TDMA), orthogonal frequency division multiple access (OFDMA), singlecarrier frequency division multiple access (SC-FDMA), and so on. TheCDMA may be implemented with a radio technology, such as universalterrestrial radio access (UTRA) or CDMA-2000. The TDMA may beimplemented with a radio technology, such as global system for mobilecommunications (GSM)/general packet ratio service (GPRS)/enhanced datarate for GSM evolution (EDGE). The OFDMA may be implemented with a radiotechnology, such as institute of electrical and electronics engineers(IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, evolved UTRA(E-UTRA), and so on. IEEE 802.16m is an evolved version of IEEE 802.16eand provides backward compatibility with a system based on the IEEE802.16e. The UTRA is part of a universal mobile telecommunication system(UMTS). 3rd generation partnership project (3GPP) long term evolution(LTE) is part of an evolved UMTS (E-UMTS) using the E-UTRA. The 3GPP LTEuses the OFDMA in a downlink and uses the SC-FDMA in an uplink.LTE-advanced (LTE-A) is an evolution of the LTE.

5G NR is a successive technology of LTE-A corresponding to a newClean-slate type mobile communication system having the characteristicsof high performance, low latency, high availability, and so on. 5G NRmay use resources of all spectrum available for usage including lowfrequency bands of less than 1 GHz, middle frequency bands ranging from1 GHz to 10 GHz, high frequency (millimeter waves) of 24 GHz or more,and so on.

For clarity in the description, the following description will mostlyfocus on LTE-A or 5G NR. However, technical features according to anembodiment of the present disclosure will not be limited only to this.

FIG. 2 shows a structure of an NR system, based on an embodiment of thepresent disclosure. The embodiment of FIG. 2 may be combined withvarious embodiments of the present disclosure.

Referring to FIG. 2 , a next generation-radio access network (NG-RAN)may include a BS 20 providing a UE 10 with a user plane and controlplane protocol termination. For example, the BS 20 may include a nextgeneration-Node B (gNB) and/or an evolved-NodeB (eNB). For example, theUE 10 may be fixed or mobile and may be referred to as other terms, suchas a mobile station (MS), a user terminal (UT), a subscriber station(SS), a mobile terminal (MT), wireless device, and so on. For example,the BS may be referred to as a fixed station which communicates with theUE 10 and may be referred to as other terms, such as a base transceiversystem (BTS), an access point (AP), and so on.

The embodiment of FIG. 2 exemplifies a case where only the gNB isincluded. The BSs 20 may be connected to one another via Xn interface.The BS 20 may be connected to one another via 5th generation (5G) corenetwork (5GC) and NG interface. More specifically, the BSs 20 may beconnected to an access and mobility management function (AMF) 30 viaNG-C interface, and may be connected to a user plane function (UPF) 30via NG-U interface.

FIG. 3 shows a functional division between an NG-RAN and a 5GC, based onan embodiment of the present disclosure. The embodiment of FIG. 3 may becombined with various embodiments of the present disclosure.

Referring to FIG. 3 , the gNB may provide functions, such as Inter CellRadio Resource Management (RRM), Radio Bearer (RB) control, ConnectionMobility Control, Radio Admission Control, Measurement Configuration &Provision, Dynamic Resource Allocation, and so on. An AMF may providefunctions, such as Non Access Stratum (NAS) security, idle statemobility processing, and so on. A UPF may provide functions, such asMobility Anchoring, Protocol Data Unit (PDU) processing, and so on. ASession Management Function (SMF) may provide functions, such as userequipment (UE) Internet Protocol (IP) address allocation, PDU sessioncontrol, and so on.

Layers of a radio interface protocol between the UE and the network canbe classified into a first layer (L1), a second layer (L2), and a thirdlayer (L3) based on the lower three layers of the open systeminterconnection (OSI) model that is well-known in the communicationsystem. Among them, a physical (PHY) layer belonging to the first layerprovides an information transfer service by using a physical channel,and a radio resource control (RRC) layer belonging to the third layerserves to control a radio resource between the UE and the network. Forthis, the RRC layer exchanges an RRC message between the UE and the BS.

FIG. 4 shows a radio protocol architecture, based on an embodiment ofthe present disclosure. The embodiment of FIG. 4 may be combined withvarious embodiments of the present disclosure. Specifically, FIG. 4(a)shows a radio protocol architecture for a user plane, and FIG. 4(b)shows a radio protocol architecture for a control plane. The user planecorresponds to a protocol stack for user data transmission, and thecontrol plane corresponds to a protocol stack for control signaltransmission.

Referring to FIG. 4 , a physical layer provides an upper layer with aninformation transfer service through a physical channel. The physicallayer is connected to a medium access control (MAC) layer which is anupper layer of the physical layer through a transport channel. Data istransferred between the MAC layer and the physical layer through thetransport channel. The transport channel is classified according to howand with what characteristics data is transmitted through a radiointerface.

Between different physical layers, i.e., a physical layer of atransmitter and a physical layer of a receiver, data are transferredthrough the physical channel. The physical channel is modulated using anorthogonal frequency division multiplexing (OFDM) scheme, and utilizestime and frequency as a radio resource.

The MAC layer provides services to a radio link control (RLC) layer,which is a higher layer of the MAC layer, via a logical channel. The MAClayer provides a function of mapping multiple logical channels tomultiple transport channels. The MAC layer also provides a function oflogical channel multiplexing by mapping multiple logical channels to asingle transport channel. The MAC layer provides data transfer servicesover logical channels.

The RLC layer performs concatenation, segmentation, and reassembly ofRadio Link Control Service Data Unit (RLC SDU). In order to ensurediverse quality of service (QoS) required by a radio bearer (RB), theRLC layer provides three types of operation modes, i.e., a transparentmode (TM), an unacknowledged mode (UM), and an acknowledged mode (AM).An AM RLC provides error correction through an automatic repeat request(ARQ).

A radio resource control (RRC) layer is defined only in the controlplane. The RRC layer serves to control the logical channel, thetransport channel, and the physical channel in association withconfiguration, reconfiguration and release of RBs. The RB is a logicalpath provided by the first layer (i.e., the physical layer or the PHYlayer) and the second layer (i.e., the MAC layer, the RLC layer, and thepacket data convergence protocol (PDCP) layer) for data delivery betweenthe UE and the network.

Functions of a packet data convergence protocol (PDCP) layer in the userplane include user data delivery, header compression, and ciphering.Functions of a PDCP layer in the control plane include control-planedata delivery and ciphering/integrity protection.

A service data adaptation protocol (SDAP) layer is defined only in auser plane. The SDAP layer performs mapping between a Quality of Service(QoS) flow and a data radio bearer (DRB) and QoS flow ID (QFI) markingin both DL and UL packets.

The configuration of the RB implies a process for specifying a radioprotocol layer and channel properties to provide a particular serviceand for determining respective detailed parameters and operations. TheRB can be classified into two types, i.e., a signaling RB (SRB) and adata RB (DRB). The SRB is used as a path for transmitting an RRC messagein the control plane. The DRB is used as a path for transmitting userdata in the user plane.

When an RRC connection is established between an RRC layer of the UE andan RRC layer of the E-UTRAN, the UE is in an RRC_CONNECTED state, and,otherwise, the UE may be in an RRC_IDLE state. In case of the NR, anRRC_INACTIVE state is additionally defined, and a UE being in theRRC_INACTIVE state may maintain its connection with a core networkwhereas its connection with the BS is released.

Data is transmitted from the network to the UE through a downlinktransport channel Examples of the downlink transport channel include abroadcast channel (BCH) for transmitting system information and adownlink-shared channel (SCH) for transmitting user traffic or controlmessages. Traffic of downlink multicast or broadcast services or thecontrol messages can be transmitted on the downlink-SCH or an additionaldownlink multicast channel (MCH). Data is transmitted from the UE to thenetwork through an uplink transport channel. Examples of the uplinktransport channel include a random access channel (RACH) fortransmitting an initial control message and an uplink SCH fortransmitting user traffic or control messages.

Examples of logical channels belonging to a higher channel of thetransport channel and mapped onto the transport channels include abroadcast channel (BCCH), a paging control channel (PCCH), a commoncontrol channel (CCCH), a multicast control channel (MCCH), a multicasttraffic channel (MTCH), etc.

The physical channel includes several OFDM symbols in a time domain andseveral sub-carriers in a frequency domain. One sub-frame includes aplurality of OFDM symbols in the time domain. A resource block is a unitof resource allocation, and consists of a plurality of OFDM symbols anda plurality of sub-carriers. Further, each subframe may use specificsub-carriers of specific OFDM symbols (e.g., a first OFDM symbol) of acorresponding subframe for a physical downlink control channel (PDCCH),i.e., an L1/L2 control channel. A transmission time interval (TTI) is aunit time of subframe transmission.

FIG. 5 shows a structure of an NR system, based on an embodiment of thepresent disclosure. The embodiment of FIG. 5 may be combined withvarious embodiments of the present disclosure.

Referring to FIG. 5 , in the NR, a radio frame may be used forperforming uplink and downlink transmission. A radio frame has a lengthof 10 ms and may be defined to be configured of two half-frames (HFs). Ahalf-frame may include five 1 ms subframes (SFs). A subframe (SF) may bedivided into one or more slots, and the number of slots within asubframe may be determined based on subcarrier spacing (SCS). Each slotmay include 12 or 14 OFDM(A) symbols according to a cyclic prefix (CP).

In case of using a normal CP, each slot may include 14 symbols. In caseof using an extended CP, each slot may include 12 symbols. Herein, asymbol may include an OFDM symbol (or CP-OFDM symbol) and a SingleCarrier-FDMA (SC-FDMA) symbol (or Discrete Fourier Transform-spread-OFDM(DFT-s-OFDM) symbol).

Table 1 shown below represents an example of a number of symbols perslot (N^(slot) _(symb)), a number slots per frame (N^(frame,u) _(slot)),and a number of slots per subframe (N^(subframe,u) _(slot)) based on anSCS configuration (u), in a case where a normal CP is used.

TABLE 1 SCS (15 * 2^(u)) N^(slot) _(symb) N^(frame,u) _(slot)N^(subframe,u) _(slot)  15 KHz (u = 0) 14 10 1  30 KHz (u = 1) 14 20 2 60 KHz (u = 2) 14 40 4 120 KHz (u = 3) 14 80 8 240 KHz (u = 4) 14 16016

Table 2 shows an example of a number of symbols per slot, a number ofslots per frame, and a number of slots per subframe based on the SCS, ina case where an extended CP is used.

TABLE 2 SCS (15 * 2^(u)) N^(slot) _(symb) N^(frame,u) _(slot)N^(subframe,u) _(slot) 60 KHz (u = 2) 12 40 4

In an NR system, OFDM(A) numerologies (e.g., SCS, CP length, and so on)between multiple cells being integrate to one UE may be differentlyconfigured. Accordingly, a (absolute time) duration (or section) of atime resource (e.g., subframe, slot or TTI) (collectively referred to asa time unit (TU) for simplicity) being configured of the same number ofsymbols may be differently configured in the integrated cells.

In the NR, multiple numerologies or SCSs for supporting diverse 5Gservices may be supported. For example, in case an SCS is 15 kHz, a widearea of the conventional cellular bands may be supported, and, in casean SCS is 30 kHz/60 kHz a dense-urban, lower latency, wider carrierbandwidth may be supported. In case the SCS is 60 kHz or higher, abandwidth that is greater than 24.25 GHz may be used in order toovercome phase noise.

An NR frequency band may be defined as two different types of frequencyranges. The two different types of frequency ranges may be FR1 and FR2.The values of the frequency ranges may be changed (or varied), and, forexample, the two different types of frequency ranges may be as shownbelow in Table 3. Among the frequency ranges that are used in an NRsystem, FR1 may mean a “sub 6 GHz range”, and FR2 may mean an “above 6GHz range” and may also be referred to as a millimeter wave (mmW).

TABLE 3 Frequency Range Corresponding Subcarrier Spacing designationfrequency range (SCS) FR1  450 MHz-6000 MHz 15, 30, 60 kHz FR2 24250MHz-52600 MHz 60, 120, 240 kHz

As described above, the values of the frequency ranges in the NR systemmay be changed (or varied). For example, as shown below in Table 4, FR1may include a band within a range of 410 MHz to 7125 MHz. Morespecifically, FR1 may include a frequency band of 6 GHz (or 5850, 5900,5925 MHz, and so on) and higher. For example, a frequency band of 6 GHz(or 5850, 5900, 5925 MHz, and so on) and higher being included in FR1mat include an unlicensed band. The unlicensed band may be used fordiverse purposes, e.g., the unlicensed band for vehicle-specificcommunication (e.g., automated driving).

TABLE 4 Frequency Range Corresponding Subcarrier Spacing designationfrequency range (SCS) FR1  410 MHz-7125 MHz 15, 30, 60 kHz FR2 24250MHz-52600 MHz 60, 120, 240 kHz

FIG. 6 shows a structure of a slot of an NR frame, based on anembodiment of the present disclosure. The embodiment of FIG. 6 may becombined with various embodiments of the present disclosure.

Referring to FIG. 6 , a slot includes a plurality of symbols in a timedomain. For example, in case of a normal CP, one slot may include 14symbols. However, in case of an extended CP, one slot may include 12symbols. Alternatively, in case of a normal CP, one slot may include 7symbols. However, in case of an extended CP, one slot may include 6symbols.

A carrier includes a plurality of subcarriers in a frequency domain AResource Block (RB) may be defined as a plurality of consecutivesubcarriers (e.g., 12 subcarriers) in the frequency domain. A BandwidthPart (BWP) may be defined as a plurality of consecutive (Physical)Resource Blocks ((P)RBs) in the frequency domain, and the BWP maycorrespond to one numerology (e.g., SCS, CP length, and so on). Acarrier may include a maximum of N number BWPs (e.g., 5 BWPs). Datacommunication may be performed via an activated BWP. Each element may bereferred to as a Resource Element (RE) within a resource grid and onecomplex symbol may be mapped to each element.

Meanwhile, a radio interface between a UE and another UE or a radiointerface between the UE and a network may consist of an L1 layer, an L2layer, and an L3 layer. In various embodiments of the presentdisclosure, the L1 layer may imply a physical layer. In addition, forexample, the L2 layer may imply at least one of a MAC layer, an RLClayer, a PDCP layer, and an SDAP layer. In addition, for example, the L3layer may imply an RRC layer.

Hereinafter, a bandwidth part (BWP) and a carrier will be described.

The BWP may be a set of consecutive physical resource blocks (PRBs) in agiven numerology. The PRB may be selected from consecutive sub-sets ofcommon resource blocks (CRBs) for the given numerology on a givencarrier.

When using bandwidth adaptation (BA), a reception bandwidth andtransmission bandwidth of a UE are not necessarily as large as abandwidth of a cell, and the reception bandwidth and transmissionbandwidth of the BS may be adjusted. For example, a network/BS mayinform the UE of bandwidth adjustment. For example, the UE receiveinformation/configuration for bandwidth adjustment from the network/BS.In this case, the UE may perform bandwidth adjustment based on thereceived information/configuration. For example, the bandwidthadjustment may include an increase/decrease of the bandwidth, a positionchange of the bandwidth, or a change in subcarrier spacing of thebandwidth.

For example, the bandwidth may be decreased during a period in whichactivity is low to save power. For example, the position of thebandwidth may move in a frequency domain. For example, the position ofthe bandwidth may move in the frequency domain to increase schedulingflexibility. For example, the subcarrier spacing of the bandwidth may bechanged. For example, the subcarrier spacing of the bandwidth may bechanged to allow a different service. A subset of a total cell bandwidthof a cell may be called a bandwidth part (BWP). The BA may be performedwhen the BS/network configures the BWP to the UE and the BS/networkinforms the UE of the BWP currently in an active state among theconfigured BWPs.

For example, the BWP may be at least any one of an active BWP, aninitial BWP, and/or a default BWP. For example, the UE may not monitordownlink radio link quality in a DL BWP other than an active DL BWP on aprimary cell (PCell). For example, the UE may not receive PDCCH,physical downlink shared channel (PDSCH), or channel stateinformation-reference signal (CSI-RS) (excluding RRM) outside the activeDL BWP. For example, the UE may not trigger a channel state information(CSI) report for the inactive DL BWP. For example, the UE may nottransmit physical uplink control channel (PUCCH) or physical uplinkshared channel (PUSCH) outside an active UL BWP. For example, in adownlink case, the initial BWP may be given as a consecutive RB set fora remaining minimum system information (RMSI) control resource set(CORESET) (configured by physical broadcast channel (PBCH)). Forexample, in an uplink case, the initial BWP may be given by systeminformation block (SIB) for a random access procedure. For example, thedefault BWP may be configured by a higher layer. For example, an initialvalue of the default BWP may be an initial DL BWP. For energy saving, ifthe UE fails to detect downlink control information (DCI) during aspecific period, the UE may switch the active BWP of the UE to thedefault BWP.

Meanwhile, the BWP may be defined for SL. The same SL BWP may be used intransmission and reception. For example, a transmitting UE may transmita SL channel or a SL signal on a specific BWP, and a receiving UE mayreceive the SL channel or the SL signal on the specific BWP. In alicensed carrier, the SL BWP may be defined separately from a Uu BWP,and the SL BWP may have configuration signaling separate from the UuBWP. For example, the UE may receive a configuration for the SL BWP fromthe BS/network. The SL BWP may be (pre-)configured in a carrier withrespect to an out-of-coverage NR V2X UE and an RRC_IDLE UE. For the UEin the RRC_CONNECTED mode, at least one SL BWP may be activated in thecarrier.

FIG. 7 shows an example of a BWP, based on an embodiment of the presentdisclosure. The embodiment of FIG. 7 may be combined with variousembodiments of the present disclosure. It is assumed in the embodimentof FIG. 7 that the number of BWPs is 3.

Referring to FIG. 7 , a common resource block (CRB) may be a carrierresource block numbered from one end of a carrier band to the other endthereof. In addition, the PRB may be a resource block numbered withineach BWP. A point A may indicate a common reference point for a resourceblock grid.

The BWP may be configured by a point A, an offset N^(start) _(BWP) fromthe point A, and a bandwidth N^(size) _(BWP). For example, the point Amay be an external reference point of a PRB of a carrier in which asubcarrier 0 of all numerologies (e.g., all numerologies supported by anetwork on that carrier) is aligned. For example, the offset may be aPRB interval between a lowest subcarrier and the point A in a givennumerology. For example, the bandwidth may be the number of PRBs in thegiven numerology.

Hereinafter, V2X or SL communication will be described.

FIG. 8 shows a radio protocol architecture for a SL communication, basedon an embodiment of the present disclosure. The embodiment of FIG. 8 maybe combined with various embodiments of the present disclosure. Morespecifically, FIG. 8(a) shows a user plane protocol stack, and FIG. 8(b)shows a control plane protocol stack.

Hereinafter, a sidelink synchronization signal (SLSS) andsynchronization information will be described.

The SLSS may include a primary sidelink synchronization signal (PSSS)and a secondary sidelink synchronization signal (SSSS), as a SL-specificsequence. The PSSS may be referred to as a sidelink primarysynchronization signal (S-PSS), and the SSSS may be referred to as asidelink secondary synchronization signal (S-SSS). For example,length-127 M-sequences may be used for the S-PSS, and length-127 goldsequences may be used for the S-SSS. For example, a UE may use the S-PSSfor initial signal detection and for synchronization acquisition. Forexample, the UE may use the S-PSS and the S-SSS for acquisition ofdetailed synchronization and for detection of a synchronization signalID.

A physical sidelink broadcast channel (PSBCH) may be a (broadcast)channel for transmitting default (system) information which must befirst known by the UE before SL signal transmission/reception. Forexample, the default information may be information related to SLSS, aduplex mode (DM), a time division duplex (TDD) uplink/downlink (UL/DL)configuration, information related to a resource pool, a type of anapplication related to the SLSS, a subframe offset, broadcastinformation, or the like. For example, for evaluation of PSBCHperformance, in NR V2X, a payload size of the PSBCH may be 56 bitsincluding 24-bit cyclic redundancy check (CRC).

The S-PSS, the S-SSS, and the PSBCH may be included in a block format(e.g., SL synchronization signal (SS)/PSBCH block, hereinafter,sidelink-synchronization signal block (S-SSB)) supporting periodicaltransmission. The S-SSB may have the same numerology (i.e., SCS and CPlength) as a physical sidelink control channel (PSCCH)/physical sidelinkshared channel (PSSCH) in a carrier, and a transmission bandwidth mayexist within a (pre-)configured sidelink (SL) BWP. For example, theS-SSB may have a bandwidth of 11 resource blocks (RBs). For example, thePSBCH may exist across 11 RBs. In addition, a frequency position of theS-SSB may be (pre-)configured. Accordingly, the UE does not have toperform hypothesis detection at frequency to discover the S-SSB in thecarrier.

FIG. 9 shows a UE performing V2X or SL communication, based on anembodiment of the present disclosure. The embodiment of FIG. 9 may becombined with various embodiments of the present disclosure.

Referring to FIG. 9 , in V2X or SL communication, the term ‘UE’ maygenerally imply a UE of a user. However, if a network equipment such asa BS transmits/receives a signal according to a communication schemebetween UEs, the BS may also be regarded as a sort of the UE. Forexample, a UE 1 may be a first apparatus 100, and a UE 2 may be a secondapparatus 200.

For example, the UE 1 may select a resource unit corresponding to aspecific resource in a resource pool which implies a set of series ofresources. In addition, the UE 1 may transmit a SL signal by using theresource unit. For example, a resource pool in which the UE 1 is capableof transmitting a signal may be configured to the UE 2 which is areceiving UE, and the signal of the UE 1 may be detected in the resourcepool.

Herein, if the UE 1 is within a connectivity range of the BS, the BS mayinform the UE 1 of the resource pool. Otherwise, if the UE 1 is out ofthe connectivity range of the BS, another UE may inform the UE 1 of theresource pool, or the UE 1 may use a pre-configured resource pool.

In general, the resource pool may be configured in unit of a pluralityof resources, and each UE may select a unit of one or a plurality ofresources to use it in SL signal transmission thereof.

Hereinafter, resource allocation in SL will be described.

FIG. 10 shows a procedure of performing V2X or SL communication by a UEbased on a transmission mode, based on an embodiment of the presentdisclosure. The embodiment of FIG. 10 may be combined with variousembodiments of the present disclosure. In various embodiments of thepresent disclosure, the transmission mode may be called a mode or aresource allocation mode. Hereinafter, for convenience of explanation,in LTE, the transmission mode may be called an LTE transmission mode. InNR, the transmission mode may be called an NR resource allocation mode.

For example, FIG. 10(a) shows a UE operation related to an LTEtransmission mode 1 or an LTE transmission mode 3. Alternatively, forexample, FIG. 10(a) shows a UE operation related to an NR resourceallocation mode 1. For example, the LTE transmission mode 1 may beapplied to general SL communication, and the LTE transmission mode 3 maybe applied to V2X communication.

For example, FIG. 10(b) shows a UE operation related to an LTEtransmission mode 2 or an LTE transmission mode 4. Alternatively, forexample, FIG. 10(b) shows a UE operation related to an NR resourceallocation mode 2.

Referring to FIG. 10(a), in the LTE transmission mode 1, the LTEtransmission mode 3, or the NR resource allocation mode 1, a BS mayschedule a SL resource to be used by the UE for SL transmission. Forexample, the BS may perform resource scheduling to a UE 1 through aPDCCH (more specifically, downlink control information (DCI)), and theUE 1 may perform V2X or SL communication with respect to a UE 2according to the resource scheduling. For example, the UE 1 may transmita sidelink control information (SCI) to the UE 2 through a physicalsidelink control channel (PSCCH), and thereafter transmit data based onthe SCI to the UE 2 through a physical sidelink shared channel (PSSCH).

Referring to FIG. 10(b), in the LTE transmission mode 2, the LTEtransmission mode 4, or the NR resource allocation mode 2, the UE maydetermine a SL transmission resource within a SL resource configured bya BS/network or a pre-configured SL resource. For example, theconfigured SL resource or the pre-configured SL resource may be aresource pool. For example, the UE may autonomously select or schedule aresource for SL transmission. For example, the UE may perform SLcommunication by autonomously selecting a resource within a configuredresource pool. For example, the UE may autonomously select a resourcewithin a selective window by performing a sensing and resource(re)selection procedure. For example, the sensing may be performed inunit of subchannels. In addition, the UE 1 which has autonomouslyselected the resource within the resource pool may transmit the SCI tothe UE 2 through a PSCCH, and thereafter may transmit data based on theSCI to the UE 2 through a PSSCH.

FIG. 11 shows three cast types, based on an embodiment of the presentdisclosure. The embodiment of FIG. 11 may be combined with variousembodiments of the present disclosure. Specifically, FIG. 11(a) showsbroadcast-type SL communication, FIG. 11(b) shows unicast type-SLcommunication, and FIG. 11(c) shows groupcast-type SL communication. Incase of the unicast-type SL communication, a UE may perform one-to-onecommunication with respect to another UE. In case of the groupcast-typeSL transmission, the UE may perform SL communication with respect to oneor more UEs in a group to which the UE belongs. In various embodimentsof the present disclosure, SL groupcast communication may be replacedwith SL multicast communication, SL one-to-many communication, or thelike.

FIG. 12 shows a synchronization source or synchronization reference ofV2X, based on an embodiment of the present disclosure. The embodiment ofFIG. 12 may be combined with various embodiments of the presentdisclosure.

Referring to FIG. 12 , in V2X, a UE may be directly synchronized with aglobal navigation satellite system (GNSS), or may be indirectlysynchronized with the GNSS through a UE (inside network coverage oroutside network coverage) directly synchronized with the GNSS. If theGNSS is configured as the synchronization source, the UE may calculate aDFN and a subframe number by using a coordinated universal time (UTC)and a (pre-)configured direct frame number (DFN) offset.

Alternatively, the UE may be directly synchronized with a BS, or may besynchronized with another UE which is time/frequency-synchronized withthe BS. For example, the BS may be an eNB or a gNB. For example, if theUE is inside the network coverage, the UE may receive synchronizationinformation provided by the BS, and may be directly synchronized withthe BS. Thereafter, the UE may provide the synchronization informationto adjacent another UE. If BS timing is configured based onsynchronization, for synchronization and downlink measurement, the UEmay be dependent on a cell related to a corresponding frequency (when itis inside the cell coverage at the frequency), or a primary cell or aserving cell (when it is outside the cell coverage at the frequency).

The BS (e.g., serving cell) may provide a synchronization configurationfor a carrier used in V2X or SL communication. In this case, the UE mayconform to the synchronization configuration received from the BS. Ifthe UE fails to detect any cell in a carrier used in the V2X or SLcommunication and fails to receive the synchronization configurationfrom the serving cell, the UE may conform to a pre-configuredsynchronization configuration.

Alternatively, the UE may be synchronized with another UE which fails toobtain synchronization information directly or indirectly from the BS orthe GNSS. A synchronization source or preference may be pre-configuredto the UE. Alternatively, the synchronization source and preference maybe configured through a control message provided by the BS.

A SL synchronization source may be associated/related with asynchronization priority. For example, a relation between thesynchronization source and the synchronization priority may be definedas shown in Table 5 or Table 6. Table 5 or Table 6 are for exemplarypurposes only, and the relation between the synchronization source andthe synchronization priority may be defined in various forms.

TABLE 5 Priority level GNSS-based synchronization eNB/gNB-basedsynchronization P0 GNSS BS P1 All UEs directly synchronized with All UEsdirectly synchronized with GNSS BS P2 All UEs indirectly synchronizedwith All UEs indirectly synchronized with GNSS BS P3 All other UEs GNSSP4 N/A All UEs indirectly synchronized with GNSS P5 N/A All UEs directlysynchronized with GNSS P6 N/A All other UEs

TABLE 6 Priority GNSS-based eNB/gNB-based level synchronizationsynchronization P0 GNSS BS P1 All UEs directly All UEs directlysynchronized with GNSS synchronized with BS P2 All UEs indirectly AllUEs indirectly synchronized with GNSS synchronized with BS P3 BS GNSS P4All UEs directly All UEs directly synchronized with BS synchronized withGNSS P5 All UEs indirectly All UEs indirectly synchronized with BSsynchronized with GNSS P6 Remaining UE(s) having Remaining UE(s) havinglow priority low priority

In Table 5 or Table 6, PO may denote a highest priority, and P6 maydenote a lowest priority. In Table 5 or Table 6, the BS may include atleast one of a gNB and an eNB.

Whether to use GNSS-based synchronization or BS-based synchronizationmay be (pre-)configured. In a single-carrier operation, the UE mayderive transmission timing of the UE from an available synchronizationreference having the highest priority.

Hereinafter, a hybrid automatic repeat request (HARQ) procedure will bedescribed.

An error compensation scheme is used to secure communicationreliability. Examples of the error compensation scheme may include aforward error correction (FEC) scheme and an automatic repeat request(ARQ) scheme. In the FEC scheme, errors in a receiving end are correctedby attaching an extra error correction code to information bits. The FECscheme has an advantage in that time delay is small and no informationis additionally exchanged between a transmitting end and the receivingend but also has a disadvantage in that system efficiency deterioratesin a good channel environment. The ARQ scheme has an advantage in thattransmission reliability can be increased but also has a disadvantage inthat a time delay occurs and system efficiency deteriorates in a poorchannel environment.

A hybrid automatic repeat request (HARQ) scheme is a combination of theFEC scheme and the ARQ scheme. In the HARQ scheme, it is determinedwhether an unrecoverable error is included in data received by aphysical layer, and retransmission is requested upon detecting theerror, thereby improving performance.

In case of SL unicast and groupcast, HARQ feedback and HARQ combining inthe physical layer may be supported. For example, when a receiving UEoperates in a resource allocation mode 1 or 2, the receiving UE mayreceive the PSSCH from a transmitting UE, and the receiving UE maytransmit HARQ feedback for the PSSCH to the transmitting UE by using asidelink feedback control information (SFCI) format through a physicalsidelink feedback channel (PSFCH).

For example, the SL HARQ feedback may be enabled for unicast. In thiscase, in a non-code block group (non-CBG) operation, if the receiving UEdecodes a PSCCH of which a target is the receiving UE and if thereceiving UE successfully decodes a transport block related to thePSCCH, the receiving UE may generate HARQ-ACK. In addition, thereceiving UE may transmit the HARQ-ACK to the transmitting UE.Otherwise, if the receiving UE cannot successfully decode the transportblock after decoding the PSCCH of which the target is the receiving UE,the receiving UE may generate the HARQ-NACK. In addition, the receivingUE may transmit HARQ-NACK to the transmitting UE.

For example, the SL HARQ feedback may be enabled for groupcast. Forexample, in the non-CBG operation, two HARQ feedback options may besupported for groupcast.

(1) Groupcast option 1: After the receiving UE decodes the PSCCH ofwhich the target is the receiving UE, if the receiving UE fails indecoding of a transport block related to the PSCCH, the receiving UE maytransmit HARQ-NACK to the transmitting UE through a PSFCH. Otherwise, ifthe receiving UE decodes the PSCCH of which the target is the receivingUE and if the receiving UE successfully decodes the transport blockrelated to the PSCCH, the receiving UE may not transmit the HARQ-ACK tothe transmitting UE.

(2) Groupcast option 2: After the receiving UE decodes the PSCCH ofwhich the target is the receiving UE, if the receiving UE fails indecoding of the transport block related to the PSCCH, the receiving UEmay transmit HARQ-NACK to the transmitting UE through the PSFCH. Inaddition, if the receiving UE decodes the PSCCH of which the target isthe receiving UE and if the receiving UE successfully decodes thetransport block related to the PSCCH, the receiving UE may transmit theHARQ-ACK to the transmitting UE through the PSFCH.

For example, if the groupcast option 1 is used in the SL HARQ feedback,all UEs performing groupcast communication may share a PSFCH resource.For example, UEs belonging to the same group may transmit HARQ feedbackby using the same PSFCH resource.

For example, if the groupcast option 2 is used in the SL HARQ feedback,each UE performing groupcast communication may use a different PSFCHresource for HARQ feedback transmission. For example, UEs belonging tothe same group may transmit HARQ feedback by using different PSFCHresources.

For example, when the SL HARQ feedback is enabled for groupcast, thereceiving UE may determine whether to transmit the HARQ feedback to thetransmitting UE based on a transmission-reception (TX-RX) distanceand/or reference signals received power (RSRP).

For example, in the groupcast option 1, in case of the TX-RXdistance-based HARQ feedback, if the TX-RX distance is less than orequal to a communication range requirement, the receiving UE maytransmit HARQ feedback for the PSSCH to the transmitting UE. Otherwise,if the TX-RX distance is greater than the communication rangerequirement, the receiving UE may not transmit the HARQ feedback for thePSSCH to the transmitting UE. For example, the transmitting UE mayinform the receiving UE of a location of the transmitting UE through SCIrelated to the PSSCH. For example, the SCI related to the PSSCH may besecond SCI. For example, the receiving UE may estimate or obtain theTX-RX distance based on a location of the receiving UE and the locationof the transmitting UE. For example, the receiving UE may decode the SCIrelated to the PSSCH and thus may know the communication rangerequirement used in the PSSCH.

For example, in case of the resource allocation mode 1, a time (offset)between the PSFCH and the PSSCH may be configured or pre-configured. Incase of unicast and groupcast, if retransmission is necessary on SL,this may be indicated to a BS by an in-coverage UE which uses the PUCCH.The transmitting UE may transmit an indication to a serving BS of thetransmitting UE in a form of scheduling request (SR)/buffer statusreport (BSR), not a form of HARQ ACK/NACK. In addition, even if the BSdoes not receive the indication, the BS may schedule an SLretransmission resource to the UE. For example, in case of the resourceallocation mode 2, a time (offset) between the PSFCH and the PSSCH maybe configured or pre-configured.

For example, from a perspective of UE transmission in a carrier, TDMbetween the PSCCH/PSSCH and the PSFCH may be allowed for a PSFCH formatfor SL in a slot. For example, a sequence-based PSFCH format having asingle symbol may be supported. Herein, the single symbol may not an AGCduration. For example, the sequence-based PSFCH format may be applied tounicast and groupcast.

For example, in a slot related to a resource pool, a PSFCH resource maybe configured periodically as N slot durations, or may bepre-configured. For example, N may be configured as one or more valuesgreater than or equal to 1. For example, N may be 1, 2, or 4. Forexample, HARQ feedback for transmission in a specific resource pool maybe transmitted only through a PSFCH on the specific resource pool.

For example, if the transmitting UE transmits the PSSCH to the receivingUE across a slot #X to a slot #N, the receiving UE may transmit HARQfeedback for the PSSCH to the transmitting UE in a slot #(N+A). Forexample, the slot #(N+A) may include a PSFCH resource. Herein, forexample, A may be a smallest integer greater than or equal to K. Forexample, K may be the number of logical slots. In this case, K may bethe number of slots in a resource pool. Alternatively, for example, Kmay be the number of physical slots. In this case, K may be the numberof slots inside or outside the resource pool.

For example, if the receiving UE transmits HARQ feedback on a PSFCHresource in response to one PSSCH transmitted by the transmitting UE tothe receiving UE, the receiving UE may determine a frequency domainand/or code domain of the PSFCH resource based on an implicit mechanismin a configured resource pool. For example, the receiving UE maydetermine the frequency domain and/or code domain of the PSFCH resource,based on at least one of a slot index related to PSCCH/PSSCH/PSFCH, asub-channel related to PSCCH/PSSCH, and/or an identifier for identifyingeach receiving UE in a group for HARQ feedback based on the groupcastoption 2. Additionally/alternatively, for example, the receiving UE maydetermine the frequency domain and/or code domain of the PSFCH resource,based on at least one of SL RSRP, SINR, L1 source ID, and/or locationinformation.

For example, if HARQ feedback transmission through the PSFCH of the UEand HARQ feedback reception through the PSFCH overlap, the UE may selectany one of HARQ feedback transmission through the PSFCH and HARQfeedback reception through the PSFCH based on a priority rule. Forexample, the priority rule may be based on at least priority indicationof the related PSCCH/PSSCH.

For example, if HARQ feedback transmission of a UE through a PSFCH for aplurality of UEs overlaps, the UE may select specific HARQ feedbacktransmission based on the priority rule. For example, the priority rulemay be based on at least priority indication of the related PSCCH/PSSCH.

Hereinafter, sidelink (SL) congestion control will be described.

If a UE autonomously determines an SL transmission resource, the UE alsoautonomously determines a size and frequency of use for a resource usedby the UE. Of course, due to a constraint from a network or the like, itmay be restricted to use a resource size or frequency of use, which isgreater than or equal to a specific level. However, if all UEs use arelatively great amount of resources in a situation where many UEs areconcentrated in a specific region at a specific time, overallperformance may significantly deteriorate due to mutual interference.

Accordingly, the UE may need to observe a channel situation. If it isdetermined that an excessively great amount of resources are consumed,it is preferable that the UE autonomously decreases the use ofresources. In the present disclosure, this may be defined as congestioncontrol (CR). For example, the UE may determine whether energy measuredin a unit time/frequency resource is greater than or equal to a specificlevel, and may adjust an amount and frequency of use for itstransmission resource based on a ratio of the unit time/frequencyresource in which the energy greater than or equal to the specific levelis observed. In the present disclosure, the ratio of the time/frequencyresource in which the energy greater than or equal to the specific levelis observed may be defined as a channel busy ratio (CBR). The UE maymeasure the CBR for a channel/frequency. Additionally, the UE maytransmit the measured CBR to the network/BS.

FIG. 13 shows a resource unit for CBR measurement, based on anembodiment of the present disclosure. The embodiment of FIG. 13 may becombined with various embodiments of the present disclosure.

Referring to FIG. 13 , CBR may denote the number of sub-channels inwhich a measurement result value of a received signal strength indicator(RSSI) has a value greater than or equal to a pre-configured thresholdas a result of measuring the RSSI by a UE on a sub-channel basis for aspecific period (e.g., 100 ms). Alternatively, the CBR may denote aratio of sub-channels having a value greater than or equal to apre-configured threshold among sub-channels for a specific duration. Forexample, in the embodiment of FIG. 13 , if it is assumed that a hatchedsub-channel is a sub-channel having a value greater than or equal to apre-configured threshold, the CBR may denote a ratio of the hatchedsub-channels for a period of 100 ms. Additionally, the UE may report theCBR to the BS.

Further, congestion control considering a priority of traffic (e.g.packet) may be necessary. To this end, for example, the UE may measure achannel occupancy ratio (CR). Specifically, the UE may measure the CBR,and the UE may determine a maximum value CRlimitk of a channel occupancyratio k (CRk) that can be occupied by traffic corresponding to eachpriority (e.g., k) based on the CBR. For example, the UE may derive themaximum value CRlimitk of the channel occupancy ratio with respect to apriority of each traffic, based on a predetermined table of CBRmeasurement values. For example, in case of traffic having a relativelyhigh priority, the UE may derive a maximum value of a relatively greatchannel occupancy ratio. Thereafter, the UE may perform congestioncontrol by restricting a total sum of channel occupancy ratios oftraffic, of which a priority k is lower than i, to a value less than orequal to a specific value. Based on this method, the channel occupancyratio may be more strictly restricted for traffic having a relativelylow priority.

In addition thereto, the UE may perform SL congestion control by using amethod of adjusting a level of transmit power, dropping a packet,determining whether retransmission is to be performed, adjusting atransmission RB size (Modulation and Coding Scheme (MCS) coordination),or the like.

Meanwhile, in the present disclosure, for example, a transmitting UE (TXUE) may be a UE which transmits data to a (target) receiving UE (RX UE).For example, the TX UE may be a UE which performs PSCCH transmissionand/or PSSCH transmission. For example, the TX UE may be a UE whichtransmits SL CSI-RS(s) and/or a SL CSI report request indicator to the(target) RX UE. For example, the TX UE may be a UE which transmits(pre-defined) reference signal(s) (e.g., PSSCH demodulation referencesignal (DM-RS)) and/or a SL (L1) RSRP report request indicator, to the(target) RX UE, to be used for SL (L1) RSRP measurement. For example,the TX UE may be a UE which transmits a (control) channel (e.g., PSCCH,PSSCH, etc.) and/or reference signal(s) on the (control) channel (e.g.,DM-RS, CSI-RS, etc.), to be used for a SL RLM operation and/or a SL RLFoperation of the (target) RX UE.

Meanwhile, in the present disclosure, for example, a receiving UE (RXUE) may be a UE which transmits SL HARQ feedback to a transmitting UE(TX UE) based on whether decoding of data received from the TX UE issuccessful and/or whether detection/decoding of a PSCCH (related toPSSCH scheduling) transmitted by the TX UE is successful. For example,the RX UE may be a UE which performs SL CSI transmission to the TX UEbased on SL CSI-RS(s) and/or a SL CSI report request indicator receivedfrom the TX UE. For example, the RX UE is a UE which transmits a SL (L1)RSRP measurement value, to the TX UE, measured based on (pre-defined)reference signal(s) and/or a SL (L1) RSRP report request indicatorreceived from the TX UE. For example, the RX UE may be a UE whichtransmits data of the RX UE to the TX UE. For example, the RX UE may bea UE which performs a SL RLM operation and/or a SL RLF operation basedon a (pre-configured) (control) channel and/or reference signal(s) onthe (control) channel received from the TX UE.

Meanwhile, in the present disclosure, for example, the TX UE maytransmit at least one of the following information to the RX UE throughSCI(s). Herein, for example, the TX UE may transmit at least one of thefollowing information to the RX UE through a first SCI and/or a secondSCI.

-   -   PSSCH (and/or PSCCH) related resource allocation information        (e.g., the location/number of time/frequency resources, resource        reservation information (e.g., period))    -   SL CSI report request indicator or SL (L1) RSRP (and/or SL (L1)        RSRQ and/or SL (L1) RSSI) report request indicator    -   SL CSI transmission indicator (or SL (L1) RSRP (and/or SL (L1)        RSRQ and/or SL (L1) RSSI) information transmission indicator)        (on a PSSCH)    -   Modulation and Coding Scheme (MCS) information    -   TX power information    -   L1 destination ID information and/or L1 source ID information    -   SL HARQ process ID information    -   New Data Indicator (NDI) information    -   Redundancy Version (RV) information    -   (Transmission traffic/packet related) QoS information (e.g.,        priority information)    -   SL CSI-RS transmission indicator or information on the number of        antenna ports for (transmitting) SL CSI-RS    -   TX UE location information or location (or distance range)        information of the target RX UE (for which SL HARQ feedback is        requested)    -   Reference signal (e.g., DM-RS, etc.) information related to        decoding (and/or channel estimation) of data transmitted through        a PSSCH. For example, information related to a pattern of        (time-frequency) mapping resources of DM-RS(s), RANK        information, antenna port index information, etc.

Meanwhile, in the present disclosure, for example, a PSCCH may bereplaced/substituted with a SCI and/or a first SCI and/or a second SCI,or vice versa. For example, the SCI may be replaced/substituted with thePSCCH and/or the first SCI and/or the second SCI, or vice versa. Forexample, since the TX UE may transmit the second SCI to the RX UEthrough a PSSCH, the PSSCH may be replaced/substituted with the secondSCI, or vice versa. For example, if SCI configuration fields are dividedinto two groups in consideration of a (relatively) high SCI payloadsize, the first SCI including a first SCI configuration field group maybe referred to as a 1^(st) SCI or 1^(st)-stage SCI, and the second SCIincluding a second SCI configuration field group may be referred to as a2^(nd) SCI or 2^(nd)-stage SCI. For example, the first SCI may betransmitted through a PSCCH. For example, the second SCI may betransmitted through a (independent) PSCCH. For example, the second SCImay be piggybacked and transmitted together with data through a PSSCH.

Meanwhile, in the present disclosure, for example, the term“configure/configured” or the term “define/defined” may refer to(pre)configuration from a base station or a network (through pre-definedsignaling (e.g., SIB, MAC, RRC, etc.)) (for each resource pool). Forexample, “that A is configured” may mean “that the base station/networktransmits information related to A to the UE”.

Meanwhile, in the present disclosure, for example, an RB may bereplaced/substituted with a subcarrier, or vice versa. For example, apacket or a traffic may be replaced/substituted with a transport block(TB) or a medium access control protocol data unit (MAC PDU) based on atransmission layer, or vice versa. For example, a code block group (CBG)may be replaced/substituted with a TB, or vice versa. For example, asource ID may be replaced/substituted with a destination ID, or viceversa. For example, an L1 ID may be replaced/substituted with an L2 ID,or vice versa. For example, the L1 ID may be an L1 source ID or an L1destination ID. For example, the L2 ID may be an L2 source ID or an L2destination ID.

Meanwhile, in the present disclosure, for example, an operation of thetransmitting UE to reserve/select/determine retransmission resource(s)may include: an operation of the transmitting UE toreserve/select/determine potential retransmission resource(s) for whichactual use will be determined based on SL HARQ feedback informationreceived from the receiving UE.

Meanwhile, in the present disclosure, SL MODE 1 may refer to a resourceallocation method or a communication method in which a base stationdirectly schedules SL transmission resource(s) for a TX UE throughpre-defined signaling (e.g., DCI or RRC message). For example, SL MODE 2may refer to a resource allocation method or a communication method inwhich a UE independently selects SL transmission resource(s) in aresource pool pre-configured or configured from a base station or anetwork. For example, a UE performing SL communication based on SL MODE1 may be referred to as a MODE 1 UE or MODE 1 TX UE, and a UE performingSL communication based on SL MODE 2 may be referred to as a MODE 2 UE orMODE 2 TX UE.

Meanwhile, in the present disclosure, for example, a dynamic grant (DG)may be replaced/substituted with a configured grant (CG) and/or asemi-persistent scheduling (SPS) grant, or vice versa. For example, theDG may be replaced/substituted with a combination of the CG and the SPSgrant, or vice versa. For example, the CG may include at least one of aconfigured grant (CG) type 1 and/or a configured grant (CG) type 2. Forexample, in the CG type 1, a grant may be provided by RRC signaling andmay be stored as a configured grant. For example, in the CG type 2, agrant may be provided by a PDCCH, and may be stored or deleted as aconfigured grant based on L1 signaling indicating activation ordeactivation of the grant. For example, in the CG type 1, a base stationmay allocate periodic resource(s) to a TX UE through an RRC message. Forexample, in the CG type 2, a base station may allocate periodicresource(s) to a TX UE through an RRC message, and the base station maydynamically activate or deactivate the periodic resource(s) through aDCI.

Meanwhile, in the present disclosure, a channel may bereplaced/substituted with a signal, or vice versa. For example,transmission/reception of a channel may include transmission/receptionof a signal. For example, transmission/reception of a signal may includetransmission/reception of a channel. For example, cast may bereplaced/substituted with at least one of unicast, groupcast, and/orbroadcast, or vice versa. For example, a cast type may bereplaced/substituted with at least one of unicast, groupcast, and/orbroadcast, or vice versa.

Meanwhile, in the present disclosure, a Uu channel may include a ULchannel and/or a DL channel. For example, the UL channel may include aPUSCH, a PUCCH, a sounding reference Signal (SRS), etc. For example, theDL channel may include a PDCCH, a PDSCH, a PSS/SSS, etc. For example, aSL channel may include a PSCCH, a PSSCH, a PSFCH, a PSBCH, a PSSS/SSSS,etc.

Meanwhile, in the present disclosure, a high priority may mean a smallpriority value, and a low priority may mean a large priority value. Forexample, Table 7 shows an example of priorities.

TABLE 7 service or logical channel priority value service A or logicalchannel A 1 service B or logical channel B 2 service C or logicalchannel C 3

Referring to Table 7, for example, service A or logical channel Arelated to the smallest priority value may have the highest priority.For example, service C or logical channel C related to the largestpriority value may have the lowest priority.

Based on various embodiments of the present disclosure, a method for aUE to perform power control based on a priority and an apparatussupporting the same will be described.

FIG. 14 shows a procedure in which a UE performs channel transmissionand/or channel reception based on a priority, based on an embodiment ofthe present disclosure. The embodiment of FIG. 14 may be combined withvarious embodiments of the present disclosure.

Referring to FIG. 14 , in step S1410, the UE may determine a priorityrelated to channel transmission and/or channel reception. For example,if transmission of a plurality of channels by the UE partially orentirely overlaps in the time domain on the same carrier/frequency ordifferent carriers/frequencies, the UE may consider or determinetransmission and/or reception of a channel satisfying at least onecondition of options 1-1 to 1-13 as a relatively high priority. Or, forexample, if transmission of a plurality of channels and/or reception ofa plurality of channels by the UE partially or entirely overlaps in thetime domain on the same carrier/frequency or differentcarriers/frequencies, the UE may consider or determine transmissionand/or reception satisfying at least one condition of options 1-1 to1-13 as a relatively high priority.

1) OPTION 1-1: at least one of transmission of a channel related to amessage with a relatively high priority value related to a serviceand/or QoS, reception of a channel related to a message with arelatively high priority value related to a service and/or QoS,transmission of a channel related to a message with a relatively lowlatency requirement, reception of a channel related to a message with arelatively low latency requirement, transmission of a channel related toa message with a relatively high reliability requirement, reception of achannel related to a message with a relatively high reliabilityrequirement, transmission of a channel related to a message with arelatively long minimum communication (reach) distance requirement,and/or reception of a channel related to a message with a relativelylong minimum communication (reach) distance requirement

2) OPTION 1-2: at least one of transmission of an LTE SL channel,transmission of an LTE SL channel on a Master Cell Group (MCG) or aSecondary Cell Group (SCG), transmission of an LTE Uu channel,transmission of an LTE Uu channel on a MCG or a SCG, transmission of anNR SL channel, transmission of an NR SL channel on a MCG or a SCG,transmission of an NR Uu channel, transmission of an NR Uu channel on aMCG or a SCG, reception of an LTE SL channel, reception of an LTE SLchannel on a MCG or a SCG, reception of an LTE Uu channel, reception ofan LTE Uu channel on a MCG or a SCG, reception of an NR SL channel,reception of an NR SL channel on a MCG or a SCG, reception of an NR Uuchannel, and/or reception of an NR Uu channel on a MCG or a SCG

3) OPTION 1-3: at least one of transmission of a Uu channel, receptionof a Uu channel, transmission of a SL channel, and/or reception of a SLchannel

4) OPTION 1-4: at least one of transmission of a pre-configured channel,reception of a pre-configured channel, transmission of a pre-configuredSL channel, reception of a pre-configured SL channel, transmission of apre-configured Uu channel, and/or reception of a pre-configured Uuchannel, e.g., at least one of transmission or reception of asynchronization signal, transmission or reception of a HARQ feedbackchannel, transmission or reception of a CSI feedback channel,transmission or reception of an RSRP feedback channel, and/ortransmission or reception of a PRACH

5) OPTION 1-5: transmission of a randomly selected channel and/orreception of a randomly selected channel

6) OPTION 1-6: at least one of transmission of a channel on acarrier/frequency or a resource pool with a relatively small index,reception of a channel on a carrier/frequency or a resource pool with arelatively small index, transmission of a channel on a carrier/frequencyor a resource pool with a relatively large index, reception of a channelon a carrier/frequency or a resource pool with a relatively large index,transmission of a channel on a pre-configured specific carrier/frequencyor a pre-configured specific resource pool, and/or reception of achannel on a pre-configured specific carrier/frequency or apre-configured specific resource pool

7) OPTION 1-7: transmission of a channel and/or reception of a channel

8) OPTION 1-8: at least one of transmission of a channel related to apre-configured cast type, reception of a channel related to apre-configured cast type, transmission of a channel related to apre-configured destination UE, reception of a channel related to apre-configured destination UE, transmission of a channel related to apre-configured (L1 or L2) destination ID, reception of a channel relatedto a pre-configured (L1 or L2) destination ID, transmission of a channelrelated to a pre-configured (L1 or L2) source ID, reception of a channelrelated to a pre-configured (L1 or L2) source ID, transmission of achannel related to a pre-configured service type, reception of a channelrelated to a pre-configured service type, transmission of a channelrelated to a pre-configured QoS parameter, and/or reception of a channelrelated to a pre-configured QoS parameter

9) OPTION 1-9: at least one of transmission of a channel on a resourcepool or a carrier/frequency with a relatively high congestion level(e.g., CBR), reception of a channel on a resource pool or acarrier/frequency with a relatively high congestion level, transmissionof a channel on a resource pool or a carrier/frequency with a relativelylow congestion level, reception of a channel on a resource pool or acarrier/frequency with a relatively low congestion level, transmissionof a channel on a resource pool or a carrier/frequency with a relativelyhigh channel occupancy ratio (CR), reception of a channel on a resourcepool or a carrier/frequency with a relatively high channel occupancyratio, transmission of a channel on a resource pool or acarrier/frequency with a relatively low channel occupancy ratio, and/orreception of a channel on a resource pool or a carrier/frequency with arelatively low channel occupancy ratio

10) OPTION 1-10: transmission of a channel requiring relatively highpower

11) OPTION 1-11: at least one of transmission of a channel related toMODE 1 operation, reception of a channel related to MODE 1 operation,transmission of a channel related to MODE 2 operation, and/or receptionof a channel related to MODE 2 operation

12) OPTION 1-12: at least one of transmission of a channel related toinitial transmission of a TB, reception of a channel related to initialtransmission of a TB, transmission of a channel related toretransmission of a TB, and/or reception of a channel related toretransmission of a TB

13) OPTION 1-13: transmission of a channel with a relatively high(associated) logical channel priority value and/or reception of achannel with a relatively high (associated) logical channel priorityvalue

In step S1420, the UE may perform channel transmission and/or channelreception based on the priority.

For example, transmission of a plurality of channels by the UE maypartially or entirely overlap in the time domain on the samecarrier/frequency. Alternatively, transmission of a plurality ofchannels and/or reception of a plurality of channels by the UE maypartially or entirely overlap in the time domain on the samecarrier/frequency. Hereinafter, for convenience of description, theabove-described case may be referred to as CASE A. Based on anembodiment of the present disclosure, in the case of CASE A, the UE maybe configured to omit/skip transmission and/or reception of a channelrelated to a relatively low priority. For example, the UE may onlyperform transmission and/or reception of a channel related to arelatively high priority.

For example, transmission of a plurality of channels by the UE maypartially or entirely overlap in the time domain on differentcarriers/frequencies of intra-band. Alternatively, transmission of aplurality of channels and/or reception of a plurality of channels by theUE may partially or entirely overlap in the time domain on differentcarriers/frequencies of intra-band. Hereinafter, for convenience ofdescription, the above-described case may be referred to as CASE B.Based on an embodiment of the present disclosure, in the case of CASE B,the UE may be configured to omit/skip transmission and/or reception of achannel related to a relatively low priority. For example, the UE mayonly perform transmission and/or reception of a channel related to arelatively high priority.

For example, transmission of a plurality of channels by the UE maypartially or entirely overlap in the time domain on differentcarriers/frequencies of intra-band or inter-band. Hereinafter, forconvenience of description, the above-described case may be referred toas CASE C. Based on an embodiment of the present disclosure, in the caseof CASE C, the UE may allocate required power staring from transmissionof a channel related to a relatively high priority, and the UE may(sequentially) allocate the remaining transmit power to transmission ofa channel related to the next higher priority in a descending priorityorder. For example, if the sum of power required for a plurality ofchannels transmitted at the same time is greater than the maximumtransmit power of the UE, the UE may allocate required power staringfrom transmission of a channel related to a relatively high priority,and the UE may (sequentially) allocate the remaining transmit power totransmission of a channel related to the next higher priority in adescending priority order. For example, the plurality of channelstransmitted at the same time may be a plurality of channels transmittedthrough frequency division multiplexing (FDM) at the same time. Forexample, the plurality of channels transmitted at the same time may be aplurality of channels transmitted in different frequency domains at thesame time.

For example, in the case of at least one of CASE A, CASE B and/or CASEC, if transmission and/or reception of a plurality of channels relatedto messages having the same priority value related to service and/or QoSpartially or entirely overlaps in the time domain, the UE may determineor consider transmission or reception of a channel satisfying at leastone of the options 1-1 to 1-13 as a relatively high priority. Inaddition, for example, the UE may omit/skip transmission or reception ofa channel related to a relatively low priority. For example, in the caseof CASE A and/or CASE B, the UE may omit/skip transmission or receptionof a channel related to a relatively low priority. For example, the UEmay only perform transmission or reception of a channel related to arelatively high priority.

For example, in the case of at least one of CASE A, CASE B and/or CASEC, if transmission of a plurality of channels related to messages havingthe same priority value related to service and/or QoS partially orentirely overlaps in the time domain, the UE may determine or considertransmission of a channel satisfying at least one of the options 1-1 to1-13 as a relatively high priority. In addition, for example, the UE mayallocate power for transmission of a plurality of channels. For example,in the case of CASE C, the UE may allocate required power staring fromtransmission of a channel related to a relatively high priority, and theUE may (sequentially) allocate the remaining transmit power totransmission of a channel related to the next higher priority in adescending priority order. For example, if the sum of power required fora plurality of channels transmitted at the same time is greater than themaximum transmit power of the UE, the UE may allocate required powerstaring from transmission of a channel related to a relatively highpriority, and the UE may (sequentially) allocate the remaining transmitpower to transmission of a channel related to the next higher priorityin a descending priority order.

For example, for transmission and/or reception of a plurality ofchannels related to the same priority, the UE may determine or considertransmission and/or reception of a channel that satisfies at least oneof the options 1-1 to 1-13 as transmission and/or reception of a channelwith a relatively high priority. For example, for transmission and/orreception of a plurality of channels related to the same priority, inorder for TIE-BREAKING, the UE may determine or consider transmissionand/or reception of a channel that satisfies at least one of the options1-1 to 1-13 as transmission and/or reception of a channel with arelatively high priority. Accordingly, for transmission and/or receptionof a plurality of channels related to the same priority, the UE mayfinally determine a priority of transmission and/or reception. Inaddition, for example, the UE may omit/skip transmission and/orreception of a channel with a low priority, or may perform onlytransmission and/or reception of a channel with a high priority.Alternatively, for example, the UE may preferentially allocate power totransmission of a channel with a high priority. Alternatively, forexample, for transmission of a plurality of channels related to the samepriority, the UE may distribute (remaining) transmit power at the sameratio. For example, in the case of CASE C, for transmission of aplurality of channels related to the same priority, the UE maydistribute (remaining) transmit power at the same ratio. Alternatively,for example, transmission and/or reception of a plurality of channelsrelated to the same priority may be handled by the UE implementation.

Meanwhile, for example, in the case of transmission of a channel relatedto at least one of types 1 to 6, it may be difficult for the UE todetermine an associated logical channel priority (LCP) value. Forexample, in the case of transmission of a channel related to at leastone of types 1 to 6, it may be difficult for the UE to directlydetermine a priority of an associated logical channel.

1) Type 1: a PUCCH for the UE to transmit HARQ feedback information fora PDSCH to the base station

2) Type 2: a PUCCH for the UE to transmit CSI information related to DLcommunication to the base station

3) Type 3: at least one of a PUSCH for the UE to transmit only(aperiodic) CSI information related to DL communication to the basestation, a PUSCH for the UE to transmit only HARQ feedback informationfor a PDSCH to the base station, and/or a PUSCH for the UE to transmitonly (aperiodic) CSI information related to DL communication and HARQfeedback information for a PDSCH to the base station

4) Type 4: a sounding reference signal (SRS) transmitted by the UE tothe base station in order for the base station to estimate a UL channel

5) Type 5: at least one of a PUCCH for the MODE 1 TX UE to report onlySL HARQ feedback information to the base station, a PUCCH for the MODE 1TX UE to report only SL HARQ feedback information received from the RXUE to the base station, a PUCCH for the MODE 1 TX UE to transmit SL HARQfeedback information to the base station, a PUCCH for the MODE 1 TX UEto transmit CSI information related to DL communication to the basestation, and/or a PUCCH for the MODE 1 TX UE to transmit HARQ feedbackinformation for a PDSCH to the base station

6) Type 6: at least one of a PUSCH for the MODE 1 TX UE to report onlySL HARQ feedback information to the base station, a PUSCH for the MODE 1TX UE to transmit SL HARQ feedback information to the base station, aPUSCH for the MODE 1 TX UE to transmit (aperiodic) CSI informationrelated to DL communication to the base station, and/or a PUSCH for theMODE 1 TX UE to transmit HARQ feedback information for a PDSCH to thebase station

Accordingly, the UE needs to designate/derive/determine an LCP value ora priority value related to the above-described type of the channel. Forexample, after the UE determines an LCP value or a priority valuerelated to the above-described type of the channel, the UE may perform aLogical Channel Prioritization (LCP) procedure. For example, the LCPprocedure may be performed by the MAC layer of the UE. For example, theLCP procedure may include: selecting by the UE logical channel(s) andallocating resources to the logical channel(s) based on the priority ofthe logical channel(s). For example, the UE may generate a MAC PDU basedon a priority of each logical channel and a type of a MAC controlelement (CE). In addition, for example, the MAC layer of the UE maydeliver the MAC PDU to the physical layer of the UE. In addition, forexample, the physical layer of the UE may generate packets by adding CRCto the MAC PDU. In addition, for example, the physical layer of the UEmay perform channel coding and modulation for the packets. In addition,for example, the physical layer of the UE may convert the packets intoradio signals and transmit it.

Based on various embodiments of the present disclosure, the UE mayefficiently perform the transmission/reception skip operation and/or thepower allocation operation based on the above-described priority.

FIG. 15 shows a procedure for a TX UE to report SL HARQ feedbackinformation to a base station, based on an embodiment of the presentdisclosure. The embodiment of FIG. 15 may be combined with variousembodiments of the present disclosure.

Referring to FIG. 15 , in step S1510, the base station may transmitinformation related to a SL resource and information related to a ULresource to the TX UE. For example, in the case of CG type 1-basedresource allocation, the base station may allocate/configure the SLresource and the UL resource to the TX UE through an RRC message. Forexample, in the case of CG type 2-based resource allocation, the basestation may allocate/configure the SL resource and the UL resource tothe TX UE through an RRC message and a DCI. For example, in the case ofDG-based resource allocation, the base station may allocate/configurethe SL resource and the UL resource to the TX UE through a DCI. Forexample, the SL resource may be a resource related to PSCCH transmissionand/or PSSCH transmission. For example, the UL resource may be aresource related to PUCCH transmission. For example, the UL resource maybe a resource related to PUSCH transmission.

FIG. 16 shows an example of CG type 1 or CG type 2-based resourceallocation, based on an embodiment of the present disclosure. Theembodiment of FIG. 16 may be combined with various embodiments of thepresent disclosure.

Referring to FIG. 16 , the base station may allocate periodic resourcesto the TX UE through a DCI and/or an RRC messages related to the CG.

Referring back to FIG. 15 , in step S1520, the TX UE may transmit aPSCCH to the RX UE based on information related to the SL resource. Instep S1530, the TX UE may transmit a PSSCH related to the PSCCH to theRX UE.

In step S1540, the TX UE may receive SL HARQ feedback information fromthe RX UE through a PSFCH related to the PSSCH. For example, the TX UEand the RX UE may determine a PSFCH resource related to the PSSCH, andthe TX UE may receive SL HARQ feedback from the RX UE on the PSFCHresource.

In step S1550, the TX UE may transmit SL HARQ feedback information tothe base station. Herein, for example, if the TX UE receives SL HARQfeedback information from the RX UE, the SL HARQ feedback informationmay be SL HARQ feedback information received from the RX UE. Forexample, if the TX UE receives SL HARQ feedback information from the RXUE, the SL HARQ feedback information may be HARQ feedback informationgenerated by the TX UE based on the SL HARQ feedback informationreceived from the RX UE. For example, if the TX UE does not receive SLHARQ feedback information from the RX UE, the SL HARQ feedbackinformation may be HARQ feedback information generated by the TX UE.

Hereinafter, a method for the TX UE to report SL HARQ feedbackinformation to the base station will be described in more detail.

FIG. 17 shows a procedure for a TX UE to report SL HARQ feedbackinformation to a base station, based on an embodiment of the presentdisclosure. The embodiment of FIG. 17 may be combined with variousembodiments of the present disclosure.

Referring to FIG. 17 , in step S1710, the TX UE may transmit sidelinkinformation to the RX UE. For example, the TX UE may be a MODE 1 TX UE.For example, the sidelink information may be transmitted through a PSSCHand/or a PSCCH. For example, the sidelink information may include atleast one of a sidelink message, a sidelink packet, a sidelink service,sidelink data, sidelink control information, and/or a sidelink transportblock (TB).

In step S1720, the TX UE may receive SL HARQ feedback information forthe sidelink information from the RX UE. For example, the SL HARQfeedback information may be received through a PSFCH.

In step S1730, the TX UE may determine a priority of a first channelthrough which SL HARQ feedback information is transmitted. For example,the first channel may include a PUCCH and/or a PUSCH. In addition, forexample, the TX UE may perform power control for transmission of thefirst channel based on the priority. For example, in the case of atleast one of CASE A, CASE B and/or CASE C, if transmission and/orreception of a plurality of channels related to messages having the samepriority partially or entirely overlap in the time domain, the TX UE maydetermine or consider transmission or reception of a channel satisfyingat least one of the options 1-1 to 1-13 as a relatively high priority.

For example, in the case of a channel related to the type 5 and/or thetype 6, the TX UE may know a priority of sidelink information associatedwith each SL HARQ feedback information. For example, the priority may bea service-related priority and/or a QoS-related priority.

For example, the TX UE may select or determine or consider the minimumvalue, among priority values of sidelink information associated with SLHARQ feedback information transmitted through the first channel, as apriority of transmission of the first channel. For example, the TX UEmay transmit at least one PSSCH to the RX UE, and the TX UE may receiveat least one SL HARQ feedback information from the RX UE through atleast one PSFCH related to the at least one PSSCH. In this case, eachpriority value of the at least one SL HARQ feedback information may bethe same as each priority value of the at least one PSSCH transmission.Thereafter, the TX UE may transmit the at least one SL HARQ feedbackinformation to the base station through the PUCCH. In this case, apriority value of PUCCH transmission including the at least one SL HARQfeedback information may be the smallest value among priority values ofthe at least one of SL HARQ feedback information. For example, the TX UEmay determine the priority value of the PUCCH transmission including theat least one SL HARQ feedback information based on Table 8.

TABLE 8 After a UE transmits PSSCHs and receives PSFCHs in correspondingPSFCH resource occasions, the priority value of HARQ-ACK information issame as the priority value of the PSSCH transmissions that is associatedwith the PSFCH reception occasions providing the HARQ-ACK information. Apriority value of a PUCCH transmission with one or more sidelinkHARQ-ACK information bits is the smallest priority value for the one ormore HARQ-ACK information bits.

For example, the TX UE may select or determine or consider the maximumvalue, among priority values of sidelink information associated with SLHARQ feedback information transmitted through the first channel, as apriority of transmission of the first channel. For example, the TX UEmay select or determine or consider the average value of priority valuesof sidelink information associated with SL HARQ feedback informationtransmitted through the first channel, as a priority of transmission ofthe first channel. For example, the TX UE may select or determine orconsider the weighted average value of priority values of sidelinkinformation associated with SL HARQ feedback information transmittedthrough the first channel, as a priority of transmission of the firstchannel.

For example, the proposed method can be limitedly applied only if the TXUE actually transmits (at least one) sidelink information to the RX UE.For example, the proposed method can be limitedly applied only if aPUCCH through which SL HARQ feedback information is reported and a PUCCHthrough which HARQ feedback information for a PSDCH is reported aretransmitted based on time division multiplexing (TDM). For example, theproposed method can be limitedly applied only if SL HARQ feedbackinformation and HARQ feedback information for a PSDCH are notmultiplexed in the same PUCCH.

In step S1740, the TX UE may report the SL HARQ feedback information tothe base station through the first channel. For example, the TX UE mayreport the SL HARQ feedback information to the base station through thefirst channel, by using transmit power allocated for transmission of thefirst channel.

For example, if the priority related to transmission of the firstchannel is relatively low compared to other transmission, the TX UE maynot transmit the SL HARQ feedback information to the base station. Forexample, if the priority value related to transmission of the firstchannel is larger than priority value(s) related to other transmission,the TX UE may not transmit the SL HARQ feedback information to the basestation. For example, if the priority related to transmission of thefirst channel is relatively high compared to other transmission, the TXUE may transmit the SL HARQ feedback information to the base station.For example, if the priority value related to transmission of the firstchannel is smaller than priority value(s) related to other transmission,the TX UE may transmit the SL HARQ feedback information to the basestation.

For example, if the priority related to transmission of the firstchannel is relatively high compared to other transmission, the TX UE maypreferentially allocate transmit power to transmission of the firstchannel. For example, if the priority related to transmission of thefirst channel is relatively high compared to other transmission, the TXUE may preferentially perform transmission of the first channel. Forexample, if the priority value related to transmission of the firstchannel is smaller than priority value(s) related to other transmission,the TX UE may preferentially allocate transmit power to transmission ofthe first channel. For example, if the priority value related totransmission of the first channel is smaller than priority value(s)related to other transmission, the TX UE may preferentially performtransmission of the first channel.

FIG. 18 shows a procedure for a TX UE to report SL HARQ feedbackinformation to a base station, based on an embodiment of the presentdisclosure. The embodiment of FIG. 18 may be combined with variousembodiments of the present disclosure.

For example, even if the TX UE does not actually transmit sidelinkinformation to the RX UE, the TX UE may report pre-configured SL HARQfeedback information to the base station through a first channel. Forexample, the TX UE may be a MODE 1 TX UE. For example, the sidelinkinformation may include at least one of a sidelink message, a sidelinkpacket, a sidelink service, sidelink data, sidelink control information,and/or a sidelink transport block (TB). For example, the first channelmay include a PUCCH and/or a PUSCH. For example, even if the TX UE doesnot actually transmit sidelink information to the RX UE, the TX UE mayreport pre-configured SL HARQ feedback information to the base stationthrough the first channel. For example, even if the TX UE does notreceive SL HARQ feedback information from the RX UE because the TX UEdoes not actually transmit sidelink information to the RX UE, the TX UEmay generate pre-configured SL HARQ feedback information, and the TX UEmay report pre-configured SL HARQ feedback information to the basestation through the first channel. For example, the pre-configured SLHARQ feedback information may be ACK information. In this case, the basestation may not unnecessarily allocate additional resource(s) (e.g.,resource(s) allocated by a DG) to the TX UE based on the ACKinformation. Alternatively, for example, the pre-configured SL HARQfeedback information may be NACK information and/or DTX information.

Referring to FIG. 18 , in step S1810, the TX UE may determine a priorityof the first channel through which SL HARQ feedback information istransmitted. In addition, for example, the TX UE may perform powercontrol for transmission of the first channel based on the priority. Forexample, in the case of at least one of CASE A, CASE B and/or CASE C, iftransmission and/or reception of a plurality of channels related tomessages having the same priority partially or entirely overlap in thetime domain, the TX UE may determine or consider transmission orreception of a channel satisfying at least one of the options 1-1 to1-13 as a relatively high priority.

In this case, for example, the TX UE may determine or consider apriority value of the related sidelink information as a priority valueof transmission of the first channel. For example, the TX UE maydetermine or consider the smallest priority value of the relatedsidelink information as the priority value of transmission of the firstchannel. For example, the TX UE may determine or consider the largestpriority value of the related sidelink information as the priority valueof transmission of the first channel. For example, the TX UE maydetermine or consider the average value of priority values of therelated sidelink information as the priority value of transmission ofthe first channel.

For example, the TX UE may determine or consider the maximum value,among priority values of a plurality of sidelink information related toa session, as a priority value of transmission of the first channel. Forexample, the TX UE may determine or consider the minimum value, amongpriority values of a plurality of sidelink information related to asession, as a priority value of transmission of the first channel. Forexample, the TX UE may determine or consider the average value ofpriority values of a plurality of sidelink information related to asession as a priority value of transmission of the first channel. Forexample, the TX UE may determine or consider the weighted average valueof priority values of a plurality of sidelink information related to asession as a priority value of transmission of the first channel. Forexample, the priority may include a priority related to a service and/ora priority related to QoS.

FIG. 19 shows a method for a TX UE to report SL HARQ feedbackinformation to a base station if the TX UE does not perform SLtransmission by using resource(s) within a specific period, based on anembodiment of the present disclosure. The embodiment of FIG. 19 may becombined with various embodiments of the present disclosure.

Referring to FIG. 19 , it is assumed that the TX UE performs SLtransmission by using SL resources corresponding to A. In this case, theTX UE may receive SL HARQ feedback information from the RX UE, and theTX UE may report the SL HARQ feedback information to the base station.

On the other hand, it is assumed that the TX UE does not perform SLtransmission by using SL resources corresponding to B. For example, theTX UE may not transmit a PSCCH by using SL resources corresponding to B.In this case, the TX UE may generate ACK information, and the TX UE mayperform UL transmission (e.g., PUCCH transmission) including ACKinformation to the base station. Herein, for example, a priority of theUL transmission (e.g., PUCCH transmission) may be the same as thelargest priority value among possible priority values for the session.For example, the priority of the UL transmission (e.g., PUCCHtransmission) may be the same as the largest priority value amongpossible priority values for the CG. For example, the TX UE maydetermine the priority of the ACK information based on Table 9.

TABLE 9 The UE generates an ACK if the UE does not transmit a PSCCH witha SCI format 1-A scheduling a PSSCH in any of the resources provided bya configured grant in a single period and for which the UE is provided aPUCCH resource to report HARQ-ACK information. The priority value of theACK is same as the largest priority value among the possible priorityvalues for the configured grant.

For example, the TX UE may determine or consider a pre-configuredpriority as the priority of transmission of the first channel.

For example, the proposed method can be limitedly applied only if aPUCCH through which SL HARQ feedback information is reported and a PUCCHthrough which HARQ feedback information for a PSDCH is reported aretransmitted based on TDM. For example, the proposed method can belimitedly applied only if SL HARQ feedback information and HARQ feedbackinformation for a PSDCH are not multiplexed in the same PUCCH.

Referring back to FIG. 18 , in step S1820, the TX UE may report the SLHARQ feedback information to the base station through the first channel.For example, the TX UE may report the SL HARQ feedback information tothe base station through the first channel, by using transmit powerallocated for transmission of the first channel.

For example, if the priority related to transmission of the firstchannel is relatively low compared to other transmission, the TX UE maynot transmit the SL HARQ feedback information to the base station. Forexample, if the priority value related to transmission of the firstchannel is larger than priority value(s) related to other transmission,the TX UE may not transmit the SL HARQ feedback information to the basestation. For example, if the priority related to transmission of thefirst channel is relatively high compared to other transmission, the TXUE may transmit the SL HARQ feedback information to the base station.For example, if the priority value related to transmission of the firstchannel is smaller than priority value(s) related to other transmission,the TX UE may transmit the SL HARQ feedback information to the basestation.

For example, if the priority related to transmission of the firstchannel is relatively high compared to other transmission, the TX UE maypreferentially allocate transmit power to transmission of the firstchannel. For example, if the priority related to transmission of thefirst channel is relatively high compared to other transmission, the TXUE may preferentially perform transmission of the first channel. Forexample, if the priority value related to transmission of the firstchannel is smaller than priority value(s) related to other transmission,the TX UE may preferentially allocate transmit power to transmission ofthe first channel. For example, if the priority value related totransmission of the first channel is smaller than priority value(s)related to other transmission, the TX UE may preferentially performtransmission of the first channel.

Based on an embodiment of the present disclosure, the TX UE maydetermine or consider a pre-configured priority as a priority oftransmission of the first channel. For example, the TX UE may determineor consider a priority pre-configured from the base station or thenetwork as a priority of the transmission of the first channel. Forexample, the TX UE may receive information related to a priority fromthe base station or the network. For example, the pre-configuredpriority for transmission of the first channel may be configured ordesignated differently from or independently of priorities of othertypes of PUCCH transmission or PUSCH transmission. For example, apre-configured priority of PUCCH transmission and/or PUSCH transmissionof the type 5 and/or the type 6 may be configured or designateddifferently from or independently of a priority of PUCCH transmissionand/or PUSCH transmission of the type 1 and/or the type 3.

Based on an embodiment of the present disclosure, if the TX UE transmitsonly SL HARQ feedback information through the first channel, the TX UEmay determine a priority related to transmission of the first channelbased on procedures related to FIGS. 1 to 19 .

For example, if the TX UE transmits SL HARQ feedback information andother information through the first channel, the TX UE may determine orconsider a pre-configured priority as a priority related to transmissionof the first channel. For example, if the TX UE multiplexes SL HARQfeedback information and other type information (e.g., type 1, type 2 ortype 3) and transmits it through one first channel, the TX UE maydetermine or consider a priority pre-configured from the base station orthe network as a priority related to transmission of the first channel.

For example, if the TX UE transmits SL HARQ feedback information andother information through the first channel, the TX UE may apply theprocedure related to FIGS. 1 to 19 only for the SL HARQ feedbackinformation, and thus may determine a priority related to transmissionof the first channel.

Based on an embodiment of the present disclosure, a priority of a signalrelated to the type 4 may be pre-configured for the TX UE. For example,the priority of the signal related to the type 4 may be pre-configuredfor the TX UE from the base station or the network. For example, apriority of a channel related to the type 1 may be pre-configured forthe TX UE. For example, the priority of the channel related to the type1 may be pre-configured for the TX UE from the base station or thenetwork. For example, a priority of a channel related to the type 2 maybe pre-configured for the TX UE. For example, the priority of thechannel related to the type 2 may be pre-configured for the TX UE fromthe base station or the network. For example, a priority of a channelrelated to the type 3 may be pre-configured for the TX UE. For example,the priority of the channel related to the type 3 may be pre-configuredfor the TX UE from the base station or the network.

Based on an embodiment of the present disclosure, the TX UE maydetermine or consider a priority of an associated service as a priorityof a signal related to the type 4. For example, the TX UE may determineor consider the highest priority among priorities of the associatedservices as the priority of the signal related to the type 4. Forexample, the TX UE may determine or consider the lowest priority amongpriorities of the associated services as the priority of the signalrelated to the type 4. For example, the TX UE may determine or considerthe average priority of priorities of the associated services as thepriority of the signal related to the type 4.

Based on an embodiment of the present disclosure, the TX UE maydetermine or consider a priority of an associated service as a priorityof a channel related to the type 1. For example, the TX UE may determineor consider the highest priority among priorities of the associatedservices as the priority of the channel related to the type 1. Forexample, the TX UE may determine or consider the lowest priority amongpriorities of the associated services as the priority of the channelrelated to the type 1. For example, the TX UE may determine or considerthe average priority of priorities of the associated services as thepriority of the channel related to the type 1.

Based on an embodiment of the present disclosure, the TX UE maydetermine or consider a priority of an associated service as a priorityof a channel related to the type 2. For example, the TX UE may determineor consider the highest priority among priorities of the associatedservices as the priority of the channel related to the type 2. Forexample, the TX UE may determine or consider the lowest priority amongpriorities of the associated services as the priority of the channelrelated to the type 2. For example, the TX UE may determine or considerthe average priority of priorities of the associated services as thepriority of the channel related to the type 2.

Based on an embodiment of the present disclosure, the TX UE maydetermine or consider a priority of an associated service as a priorityof a channel related to the type 3. For example, the TX UE may determineor consider the highest priority among priorities of the associatedservices as the priority of the channel related to the type 3. Forexample, the TX UE may determine or consider the lowest priority amongpriorities of the associated services as the priority of the channelrelated to the type 3. For example, the TX UE may determine or considerthe average priority of priorities of the associated services as thepriority of the channel related to the type 3.

Based on various embodiments of the present disclosure, the TX UE mayefficiently determine a priority related to transmission of a channelfor reporting SL HARQ feedback to the base station. In addition, the TXUE can efficiently perform power control for reporting the SL HARQfeedback to the base station based on the priority.

FIG. 20 shows a method for a first device to perform power controlrelated to channel transmission, based on an embodiment of the presentdisclosure. The embodiment of FIG. 20 may be combined with variousembodiments of the present disclosure.

Referring to FIG. 20 , in step S2010, the first device may determine apriority related to a channel for reporting information on SL HARQfeedback to the base station. For example, in response to sidelinkinformation transmitted by the first device to the second device, thefirst device may receive information on SL HARQ feedback from the seconddevice. For example, the sidelink information may include at least oneof a sidelink message, a sidelink packet, a sidelink service, sidelinkdata, sidelink control information, and/or a sidelink transport block(TB). For example, the priority related to the channel may be determinedbased on the priority of the sidelink information. For example, thepriority related to the channel may be configured or determined by thebase station. For example, the priority related to the channel may bedetermined based on various embodiments of the present disclosure. Forexample, the channel may include a PUCCH and/or a PUSCH.

In step S2020, the first device may perform power control related totransmission of the channel based on the priority. For example, thefirst device may determine or control transmit power of the informationon SL HARQ feedback based on the priority. For example, the first devicemay preferentially transmit the channel based on the priority. Forexample, the first device may (preferentially) allocate transmit powerto transmission of the channel based on the priority and performtransmission of the channel. For example, the first device may notperform transmission of the channel based on the priority.

FIG. 21 shows a method for a base station to receive information on SLHARQ feedback, based on an embodiment of the present disclosure. Theembodiment of FIG. 21 may be combined with various embodiments of thepresent disclosure.

Referring to FIG. 21 , in step S2110, the base station may receiveinformation on SL HARQ feedback from the first device through a channel.For example, transmit power of the information on SL HARQ feedbacktransmitted by the first device through the channel may be determined bythe first device based on a priority related to the channel. Forexample, the priority related to the channel may be determined based onthe priority of sidelink information transmitted by the first device.For example, the priority related to the channel may be determined basedon the priority of sidelink information to be transmitted by the firstdevice. For example, the priority related to the channel may beconfigured or determined by the base station. For example, the priorityrelated to the channel may be determined based on various embodiments ofthe present disclosure. For example, the sidelink information mayinclude at least one of a sidelink message, a sidelink packet, asidelink service, sidelink data, sidelink control information, and/or asidelink transport block (TB). For example, the channel may include aPUCCH and/or a PUSCH.

FIG. 22 shows a method for a first device to perform wirelesscommunication, based on an embodiment of the present disclosure. Theembodiment of FIG. 22 may be combined with various embodiments of thepresent disclosure.

Referring to FIG. 22 , in step S2210, the first device may transmit, toa second device, at least one physical sidelink control channel (PSCCH)and at least one physical sidelink shared channel (PSSCH) related to theat least one PSCCH. In step S2220, the first device may receive, fromthe second device, at least one sidelink (SL) hybrid automatic repeatrequest (HARQ) feedback information through at least one physicalsidelink feedback channel (PSFCH) related to the at least one PSSCH. Instep S2230, the first device may determine a priority value of physicaluplink control channel (PUCCH) transmission for reporting the at leastone SL HARQ feedback information to a base station, based on at leastone priority value of the at least one SL HARQ feedback information.

For example, the priority value of the PUCCH transmission may be asmallest value among the at least one priority value of the at least oneSL HARQ feedback information. Additionally, for example, the firstdevice may determine the at least one priority value of the at least oneSL HARQ feedback information. Herein, for example, the at least onepriority value of the at least one SL HARQ feedback information may be asame as at least one priority value related to transmission of the atleast one PSSCH. For example, the at least one priority value related tothe transmission of the at least one PSSCH may be included in at leastone sidelink control information (SCI) transmitted through the at leastone PSCCH.

Additionally, for example, the first device may perform the PUCCHtransmission or SL transmission based on the priority value of the PUCCHtransmission and a priority value of the SL transmission. For example,the PUCCH transmission and the SL transmission may overlap in a timedomain. For example, based on the priority value of the PUCCHtransmission being smaller than the priority value of the SLtransmission, the PUCCH transmission may be performed to the basestation. For example, based on (i) the priority value of the PUCCHtransmission being smaller than the priority value of the SLtransmission and (ii) a sum of power related to the PUCCH transmissionand power related to the SL transmission exceeding maximum transmitpower of the first device, the power related to the SL transmission maybe reduced such that the sum does not exceed the maximum transmit power.For example, based on the priority value of the PUCCH transmission beinglarger than the priority value of the SL transmission, the SLtransmission may be performed. For example, based on (i) the priorityvalue of the PUCCH transmission being larger than the priority value ofthe SL transmission, and (ii) a sum of power related to the PUCCHtransmission and power related to the SL transmission exceeding maximumtransmit power of the first device, the power related to the PUCCHtransmission may be reduced such that the sum does not exceed themaximum transmit power.

Additionally, for example, the first device may transmit a physicalrandom access channel (PRACH) to the base station. For example, apriority related to transmission of the PRACH may be higher than apriority related to transmission of a PSFCH. For example, a priorityrelated to transmission of the PRACH may be higher than a priorityrelated to transmission of a sidelink-synchronization signal block(S-SSB).

Additionally, for example, the first device may receive informationrelated to a SL resource from the base station.

The proposed method can be applied to the device(s) described in thepresent disclosure. First, the processor 102 of the first device 100 maycontrol the transceiver 106 to transmit, to a second device, at leastone physical sidelink control channel (PSCCH) and at least one physicalsidelink shared channel (PSSCH) related to the at least one PSCCH. Inaddition, the processor 102 of the first device 100 may control thetransceiver 106 to receive, from the second device, at least onesidelink (SL) hybrid automatic repeat request (HARQ) feedbackinformation through at least one physical sidelink feedback channel(PSFCH) related to the at least one PSSCH. In addition, the processor102 of the first device 100 may determine a priority value of physicaluplink control channel (PUCCH) transmission for reporting the at leastone SL HARQ feedback information to a base station, based on at leastone priority value of the at least one SL HARQ feedback information.

Based on an embodiment of the present disclosure, a first deviceconfigured to perform wireless communication may be provided. Forexample, the first device may comprise: one or more memories storinginstructions; one or more transceivers; and one or more processorsconnected to the one or more memories and the one or more transceivers.For example, the one or more processors may execute the instructions to:transmit, to a second device, at least one physical sidelink controlchannel (PSCCH) and at least one physical sidelink shared channel(PSSCH) related to the at least one PSCCH; receive, from the seconddevice, at least one sidelink (SL) hybrid automatic repeat request(HARQ) feedback information through at least one physical sidelinkfeedback channel (PSFCH) related to the at least one PSSCH; anddetermine a priority value of physical uplink control channel (PUCCH)transmission for reporting the at least one SL HARQ feedback informationto a base station, based on at least one priority value of the at leastone SL HARQ feedback information.

Based on an embodiment of the present disclosure, an apparatusconfigured to control a first user equipment (UE) performing wirelesscommunication may be provided. For example, the apparatus may comprise:one or more processors; and one or more memories operably connected tothe one or more processors and storing instructions. For example, theone or more processors may execute the instructions to: transmit, to asecond UE, at least one physical sidelink control channel (PSCCH) and atleast one physical sidelink shared channel (PSSCH) related to the atleast one PSCCH; receive, from the second UE, at least one sidelink (SL)hybrid automatic repeat request (HARQ) feedback information through atleast one physical sidelink feedback channel (PSFCH) related to the atleast one PSSCH; and determine a priority value of physical uplinkcontrol channel (PUCCH) transmission for reporting the at least one SLHARQ feedback information to a base station, based on at least onepriority value of the at least one SL HARQ feedback information.

Based on an embodiment of the present disclosure, a non-transitorycomputer-readable storage medium storing instructions may be provided.For example, the instructions, when executed, may cause a first deviceto: transmit, to a second device, at least one physical sidelink controlchannel (PSCCH) and at least one physical sidelink shared channel(PSSCH) related to the at least one PSCCH; receive, from the seconddevice, at least one sidelink (SL) hybrid automatic repeat request(HARQ) feedback information through at least one physical sidelinkfeedback channel (PSFCH) related to the at least one PSSCH; anddetermine a priority value of physical uplink control channel (PUCCH)transmission for reporting the at least one SL HARQ feedback informationto a base station, based on at least one priority value of the at leastone SL HARQ feedback information.

FIG. 23 shows a method for a base station to perform wirelesscommunication, based on an embodiment of the present disclosure. Theembodiment of FIG. 23 may be combined with various embodiments of thepresent disclosure.

Referring to FIG. 23 , in step S2310, the base station may transmit, toa first device, information related to a sidelink (SL) resource andinformation related to a physical uplink control channel (PUCCH)resource. In step S2320, the base station may receive, from the firstdevice, at least one SL hybrid automatic repeat request (HARQ) feedbackinformation based on the PUCCH resource. For example, a priority valueof PUCCH transmission by the first device may be a smallest value amongpriority values of the at least one SL HARQ feedback information.

The proposed method can be applied to the device(s) described in thepresent disclosure. First, the processor 202 of the base station 200 maycontrol the transceiver 206 to transmit, to a first device, informationrelated to a sidelink (SL) resource and information related to aphysical uplink control channel (PUCCH) resource. In addition, theprocessor 202 of the base station 200 may control the transceiver 206 toreceive, from the first device, at least one SL hybrid automatic repeatrequest (HARQ) feedback information based on the PUCCH resource. Forexample, a priority value of PUCCH transmission by the first device maybe a smallest value among priority values of the at least one SL HARQfeedback information.

Based on an embodiment of the present disclosure, a base stationconfigured to perform wireless communication may be provided. Forexample, the base station may comprise: one or more memories storinginstructions; one or more transceivers; and one or more processorsconnected to the one or more memories and the one or more transceivers.For example, the one or more processors may execute the instructions to:transmit, to a first device, information related to a sidelink (SL)resource and information related to a physical uplink control channel(PUCCH) resource; and receive, from the first device, at least one SLhybrid automatic repeat request (HARQ) feedback information based on thePUCCH resource. For example, a priority value of PUCCH transmission bythe first device may be a smallest value among priority values of the atleast one SL HARQ feedback information.

Based on an embodiment of the present disclosure, an apparatusconfigured to control a base station performing wireless communicationmay be provided. For example, the apparatus may comprise: one or moreprocessors; and one or more memories operably connected to the one ormore processors and storing instructions. For example, the one or moreprocessors may execute the instructions to: transmit, to a first userequipment (UE), information related to a sidelink (SL) resource andinformation related to a physical uplink control channel (PUCCH)resource; and receive, from the first UE, at least one SL hybridautomatic repeat request (HARQ) feedback information based on the PUCCHresource. For example, a priority value of PUCCH transmission by thefirst UE may be a smallest value among priority values of the at leastone SL HARQ feedback information.

Based on an embodiment of the present disclosure, a non-transitorycomputer-readable storage medium storing instructions may be provided.For example, the instructions, when executed, may cause a base stationto: transmit, to a first device, information related to a sidelink (SL)resource and information related to a physical uplink control channel(PUCCH) resource; and receive, from the first device, at least one SLhybrid automatic repeat request (HARQ) feedback information based on thePUCCH resource. For example, a priority value of PUCCH transmission bythe first device may be a smallest value among priority values of the atleast one SL HARQ feedback information.

FIG. 24 shows a method for a first device to perform wirelesscommunication, based on an embodiment of the present disclosure. Theembodiment of FIG. 24 may be combined with various embodiments of thepresent disclosure.

Referring to FIG. 24 , in step S2410, the first device may select asynchronization reference based on a sidelink (SL) synchronizationpriority. For example, the SL synchronization priority may be set to aglobal navigation satellite system (GNSS)-based synchronization or abase station (BS)-based synchronization, and the synchronizationreference may include at least one of a GNSS, a base station, or a UE,and based on the SL synchronization priority being set to the GNSS-basedsynchronization, a priority of a synchronization reference related tothe GNSS may be higher than a priority of a synchronization referencerelated to the base station, and based on the SL synchronizationpriority being set to the BS-based synchronization, the priority of thesynchronization reference related to the base station may be higher thanthe priority of the synchronization reference related to the GNSS. Instep S2420, the first device may obtain synchronization based on thesynchronization reference. In step S2430, the first device may transmit,to a second device, a first physical sidelink control channel (PSCCH)and a first physical sidelink shared channel (PSSCH) related to thefirst PSCCH. In step S2440, the first device may transmit, to the seconddevice, a second PSCCH and a second PSSCH related to the second PSCCH.In step S2450, the first device may receive, from the second device,first SL hybrid automatic repeat request (HARQ) feedback informationthrough a first physical sidelink feedback channel (PSFCH) related tothe first PSSCH. In step S2460, the first device may receive, from thesecond device, second SL HARQ feedback information through a secondPSFCH related to the second PSSCH. In step S2470, the first device maydetermine a priority value of physical uplink control channel (PUCCH)transmission for reporting the first SL HARQ feedback information andthe second SL HARQ feedback information to a base station, based on apriority value of the first SL HARQ feedback information and a priorityvalue of the second SL HARQ feedback information.

For example, the priority value of the PUCCH transmission may be asmallest value among the priority value of the first SL HARQ feedbackinformation and the priority value of the second SL HARQ feedbackinformation. Additionally, for example, the first device may determinethe priority value of the first SL HARQ feedback information and thepriority value of the second SL HARQ feedback information. For example,the priority value of the first SL HARQ feedback information may be asame as a priority value related to transmission of the first PSSCH, andthe priority value of the second SL HARQ feedback information may be asame as a priority value related to transmission of the second PSSCH.For example, the priority value related to the transmission of the firstPSSCH may be transmitted through a sidelink control information (SCI) onthe first PSCCH, and the priority value related to the transmission ofthe second PSSCH may be transmitted through a SCI on the second PSCCH.

Additionally, for example, the first device may receive informationrelated to SL resource allocation from the base station.

Additionally, for example, the first device may perform physical randomaccess channel (PRACH) transmission to the base station. For example, apriority of the PRACH transmission may be higher than a priority ofPSFCH transmission. For example, a priority of the PRACH transmissionmay be higher than a priority of sidelink-synchronization signal block(S-SSB) transmission.

Additionally, for example, the first device may perform the PUCCHtransmission or SL transmission based on the priority value of the PUCCHtransmission and a priority value of the SL transmission. For example,the PUCCH transmission and the SL transmission may overlap in a timedomain. For example, the priority value of the PUCCH transmission may besmaller than the priority value of the SL transmission, and the PUCCHtransmission may be performed to the base station, and the SLtransmission may not be performed. For example, the priority value ofthe PUCCH transmission may be smaller than the priority value of the SLtransmission, and a sum of power for the PUCCH transmission and powerfor the SL transmission may exceed maximum transmit power of the firstdevice, and the power for the SL transmission may be reduced such thatthe sum does not exceed the maximum transmit power. For example, thepriority value of the PUCCH transmission may be larger than the priorityvalue of the SL transmission, and the SL transmission may be performed,and the PUCCH transmission may not be performed to the base station. Forexample, the priority value of the PUCCH transmission may be larger thanthe priority value of the SL transmission, and a sum of power for thePUCCH transmission and power for the SL transmission may exceed maximumtransmit power of the first device, and the power for the PUCCHtransmission may be reduced such that the sum does not exceed themaximum transmit power.

The proposed method can be applied to the device(s) described in thepresent disclosure. First, the processor 102 of the first device 100 mayselect a synchronization reference based on a sidelink (SL)synchronization priority. For example, the SL synchronization prioritymay be set to a global navigation satellite system (GNSS)-basedsynchronization or a base station (BS)-based synchronization, and thesynchronization reference may include at least one of a GNSS, a basestation, or a UE, and based on the SL synchronization priority being setto the GNSS-based synchronization, a priority of a synchronizationreference related to the GNSS may be higher than a priority of asynchronization reference related to the base station, and based on theSL synchronization priority being set to the BS-based synchronization,the priority of the synchronization reference related to the basestation may be higher than the priority of the synchronization referencerelated to the GNSS. In addition, the processor 102 of the first device100 may obtain synchronization based on the synchronization reference.In addition, the processor 102 of the first device 100 may control thetransceiver 106 to transmit, to a second device, a first physicalsidelink control channel (PSCCH) and a first physical sidelink sharedchannel (PSSCH) related to the first PSCCH. In addition, the processor102 of the first device 100 may control the transceiver 106 to transmit,to the second device, a second PSCCH and a second PSSCH related to thesecond PSCCH. In addition, the processor 102 of the first device 100 maycontrol the transceiver 106 to receive, from the second device, first SLhybrid automatic repeat request (HARQ) feedback information through afirst physical sidelink feedback channel (PSFCH) related to the firstPSSCH. In addition, the processor 102 of the first device 100 maycontrol the transceiver 106 to receive, from the second device, secondSL HARQ feedback information through a second PSFCH related to thesecond PSSCH. In addition, the processor 102 of the first device 100 maydetermine a priority value of physical uplink control channel (PUCCH)transmission for reporting the first SL HARQ feedback information andthe second SL HARQ feedback information to a base station, based on apriority value of the first SL HARQ feedback information and a priorityvalue of the second SL HARQ feedback information.

Based on an embodiment of the present disclosure, a first deviceconfigured to perform wireless communication may be provided. Forexample, the first device may comprise: one or more memories storinginstructions; one or more transceivers; and one or more processorsconnected to the one or more memories and the one or more transceivers.For example, the one or more processors may execute the instructions to:select a synchronization reference based on a sidelink (SL)synchronization priority, wherein the SL synchronization priority is setto a global navigation satellite system (GNSS)-based synchronization ora base station (BS)-based synchronization, wherein the synchronizationreference includes at least one of a GNSS, a base station, or a UE,wherein, based on the SL synchronization priority being set to theGNSS-based synchronization, a priority of a synchronization referencerelated to the GNSS is higher than a priority of a synchronizationreference related to the base station, and wherein, based on the SLsynchronization priority being set to the BS-based synchronization, thepriority of the synchronization reference related to the base station ishigher than the priority of the synchronization reference related to theGNSS; obtain synchronization based on the synchronization reference;transmit, to a second device, a first physical sidelink control channel(PSCCH) and a first physical sidelink shared channel (PSSCH) related tothe first PSCCH; transmit, to the second device, a second PSCCH and asecond PSSCH related to the second PSCCH; receive, from the seconddevice, first SL hybrid automatic repeat request (HARQ) feedbackinformation through a first physical sidelink feedback channel (PSFCH)related to the first PSSCH; receive, from the second device, second SLHARQ feedback information through a second PSFCH related to the secondPSSCH; and based on a priority value of the first SL HARQ feedbackinformation and a priority value of the second SL HARQ feedbackinformation, determine a priority value of physical uplink controlchannel (PUCCH) transmission for reporting the first SL HARQ feedbackinformation and the second SL HARQ feedback information to a basestation.

Based on an embodiment of the present disclosure, an apparatusconfigured to control a first user equipment (UE) performing wirelesscommunication may be provided. For example, the apparatus may comprise:one or more processors; and one or more memories operably connected tothe one or more processors and storing instructions. For example, theone or more processors may execute the instructions to: select asynchronization reference based on a sidelink (SL) synchronizationpriority, wherein the SL synchronization priority is set to a globalnavigation satellite system (GNSS)-based synchronization or a basestation (BS)-based synchronization, wherein the synchronizationreference includes at least one of a GNSS, a base station, or a UE,wherein, based on the SL synchronization priority being set to theGNSS-based synchronization, a priority of a synchronization referencerelated to the GNSS is higher than a priority of a synchronizationreference related to the base station, and wherein, based on the SLsynchronization priority being set to the BS-based synchronization, thepriority of the synchronization reference related to the base station ishigher than the priority of the synchronization reference related to theGNSS; obtain synchronization based on the synchronization reference;transmit, to a second UE, a first physical sidelink control channel(PSCCH) and a first physical sidelink shared channel (PSSCH) related tothe first PSCCH; transmit, to the second UE, a second PSCCH and a secondPSSCH related to the second PSCCH; receive, from the second UE, first SLhybrid automatic repeat request (HARQ) feedback information through afirst physical sidelink feedback channel (PSFCH) related to the firstPSSCH; receive, from the second UE, second SL HARQ feedback informationthrough a second PSFCH related to the second PSSCH; and based on apriority value of the first SL HARQ feedback information and a priorityvalue of the second SL HARQ feedback information, determine a priorityvalue of physical uplink control channel (PUCCH) transmission forreporting the first SL HARQ feedback information and the second SL HARQfeedback information to a base station.

Based on an embodiment of the present disclosure, a non-transitorycomputer-readable storage medium storing instructions may be provided.For example, the instructions, when executed, may cause a first deviceto: select a synchronization reference based on a sidelink (SL)synchronization priority, wherein the SL synchronization priority is setto a global navigation satellite system (GNSS)-based synchronization ora base station (BS)-based synchronization, wherein the synchronizationreference includes at least one of a GNSS, a base station, or a UE,wherein, based on the SL synchronization priority being set to theGNSS-based synchronization, a priority of a synchronization referencerelated to the GNSS is higher than a priority of a synchronizationreference related to the base station, and wherein, based on the SLsynchronization priority being set to the BS-based synchronization, thepriority of the synchronization reference related to the base station ishigher than the priority of the synchronization reference related to theGNSS; obtain synchronization based on the synchronization reference;transmit, to a second device, a first physical sidelink control channel(PSCCH) and a first physical sidelink shared channel (PSSCH) related tothe first PSCCH; transmit, to the second device, a second PSCCH and asecond PSSCH related to the second PSCCH; receive, from the seconddevice, first SL hybrid automatic repeat request (HARQ) feedbackinformation through a first physical sidelink feedback channel (PSFCH)related to the first PSSCH; receive, from the second device, second SLHARQ feedback information through a second PSFCH related to the secondPSSCH; and based on a priority value of the first SL HARQ feedbackinformation and a priority value of the second SL HARQ feedbackinformation, determine a priority value of physical uplink controlchannel (PUCCH) transmission for reporting the first SL HARQ feedbackinformation and the second SL HARQ feedback information to a basestation.

FIG. 25 shows a method for a base station to perform wirelesscommunication, based on an embodiment of the present disclosure. Theembodiment of FIG. 25 may be combined with various embodiments of thepresent disclosure.

Referring to FIG. 25 , in step S2510, the base station may transmit, toa first device through a downlink (DL) bandwidth part (BWP), informationrelated to a sidelink (SL) resource and information related to aphysical uplink control channel (PUCCH) resource. In step S2520, thebase station may receive, from the first device through the PUCCHresource on an uplink (UL) BWP, first SL hybrid automatic repeat request(HARQ) feedback information and second SL HARQ feedback information. Forexample, a priority value of PUCCH transmission by the first device maybe a smallest value among a priority value of the first SL HARQ feedbackinformation and a priority value of the second SL HARQ feedbackinformation.

The proposed method can be applied to the device(s) described in thepresent disclosure. First, the processor 202 of the base station 200 maycontrol the transceiver 206 to transmit, to a first device through adownlink (DL) bandwidth part (BWP), information related to a sidelink(SL) resource and information related to a physical uplink controlchannel (PUCCH) resource. In addition, the processor 202 of the basestation 200 may control the transceiver 206 to receive, from the firstdevice through the PUCCH resource on an uplink (UL) BWP, first SL hybridautomatic repeat request (HARQ) feedback information and second SL HARQfeedback information. For example, a priority value of PUCCHtransmission by the first device may be a smallest value among apriority value of the first SL HARQ feedback information and a priorityvalue of the second SL HARQ feedback information.

Based on an embodiment of the present disclosure, a base stationconfigured to perform wireless communication may be provided. Forexample, the base station may comprise: one or more memories storinginstructions; one or more transceivers; and one or more processorsconnected to the one or more memories and the one or more transceivers.For example, the one or more processors may execute the instructions to:transmit, to a first device through a downlink (DL) bandwidth part(BWP), information related to a sidelink (SL) resource and informationrelated to a physical uplink control channel (PUCCH) resource; andreceive, from the first device through the PUCCH resource on an uplink(UL) BWP, first SL hybrid automatic repeat request (HARQ) feedbackinformation and second SL HARQ feedback information. For example, apriority value of PUCCH transmission by the first device may be asmallest value among a priority value of the first SL HARQ feedbackinformation and a priority value of the second SL HARQ feedbackinformation.

Based on an embodiment of the present disclosure, an apparatusconfigured to control a base station performing wireless communicationmay be provided. For example, the apparatus may comprise: one or moreprocessors; and one or more memories operably connected to the one ormore processors and storing instructions. For example, the one or moreprocessors may execute the instructions to: transmit, to a first userequipment (UE) through a downlink (DL) bandwidth part (BWP), informationrelated to a sidelink (SL) resource and information related to aphysical uplink control channel (PUCCH) resource; and receive, from thefirst UE through the PUCCH resource on an uplink (UL) BWP, first SLhybrid automatic repeat request (HARQ) feedback information and secondSL HARQ feedback information. For example, a priority value of PUCCHtransmission by the first UE may be a smallest value among a priorityvalue of the first SL HARQ feedback information and a priority value ofthe second SL HARQ feedback information.

Based on an embodiment of the present disclosure, a non-transitorycomputer-readable storage medium storing instructions may be provided.For example, the instructions, when executed, may cause a base stationto: transmit, to a first device through a downlink (DL) bandwidth part(BWP), information related to a sidelink (SL) resource and informationrelated to a physical uplink control channel (PUCCH) resource; andreceive, from the first device through the PUCCH resource on an uplink(UL) BWP, first SL hybrid automatic repeat request (HARQ) feedbackinformation and second SL HARQ feedback information. For example, apriority value of PUCCH transmission by the first device may be asmallest value among a priority value of the first SL HARQ feedbackinformation and a priority value of the second SL HARQ feedbackinformation.

FIG. 26 shows a method for a first device to perform wirelesscommunication, based on an embodiment of the present disclosure. Theembodiment of FIG. 26 may be combined with various embodiments of thepresent disclosure.

Referring to FIG. 26 , in step S2610, the first device may receive, froma base station, information related to a physical uplink control channel(PUCCH) resource for reporting hybrid automatic repeat request (HARQ)feedback information and information related to a first sidelink (SL)resource. In step S2620, the first device may generate the HARQ feedbackinformation based on first SL transmission being not performed on thefirst SL resource by the first device. In step S2630, the first devicemay determine a priority value of the HARQ feedback information. Forexample, the priority value of the HARQ feedback information may be asame as a largest priority value among at least one priority valuerelated to the first SL resource.

Additionally, for example, the first device may determine not to performthe first SL transmission on the first SL resource. For example, theHARQ feedback information generated by the first device, based on thefirst SL transmission being not performed on the first SL resource bythe first device, may be ACK. For example, the first SL transmission mayinclude physical sidelink control channel (PSCCH) transmission orphysical sidelink shared channel (PSSCH) transmission. For example, thefirst SL resource may be a resource allocated by a configured grant. Forexample, the first SL resource may be allocated periodically by theconfigured grant, and based on the first device not performing the firstSL transmission on the first SL resource within a first period allocatedby the configured grant, the ACK may be generated by the first device.

Additionally, for example, the first device may perform at least one ofsecond SL transmission based on a second SL resource or PUCCHtransmission including the HARQ feedback information based on the PUCCHresource, based on the priority value of the HARQ feedback informationand a priority value of the second SL transmission. For example, thePUCCH resource and the second SL resource may overlap in a time domain.For example, based on the priority value of the HARQ feedbackinformation being smaller than the priority value of the second SLtransmission, the PUCCH transmission including the HARQ feedbackinformation may be performed. For example, based on the priority valueof the HARQ feedback information being larger than the priority value ofthe second SL transmission, the second SL transmission may be performed.For example, based on (i) the priority value of the HARQ feedbackinformation being smaller than the priority value of the second SLtransmission and (ii) sum of power related to the PUCCH transmission andpower related to the second SL transmission exceeding maximum transmitpower of the first device, the power related to the second SLtransmission may be reduced such that the sum does not exceed themaximum transmit power. For example, based on (i) the priority value ofthe HARQ feedback information being larger than the priority value ofthe second SL transmission and (ii) sum of power related to the PUCCHtransmission and power related to the second SL transmission exceedingmaximum transmit power of the first device, the power related to thePUCCH transmission may be reduced such that the sum does not exceed themaximum transmit power.

Additionally, for example, the first device may perform physical randomaccess channel (PRACH) transmission to the base station. For example, apriority related to the PRACH transmission may be higher than a priorityrelated to PSFCH transmission or a priority related tosidelink-synchronization signal block (S-SSB) transmission.

For example, the at least one priority value related to the first SLresource may be at least one possible priority value for a configuredgrant related to the first SL resource.

The proposed method can be applied to the device(s) described in thepresent disclosure. First, the processor 102 of the first device 100 maycontrol the transceiver 106 to receive, from a base station, informationrelated to a physical uplink control channel (PUCCH) resource forreporting hybrid automatic repeat request (HARQ) feedback informationand information related to a first sidelink (SL) resource. In addition,the processor 102 of the first device 100 may generate the HARQ feedbackinformation based on first SL transmission being not performed on thefirst SL resource by the first device. In addition, the processor 102 ofthe first device 100 may determine a priority value of the HARQ feedbackinformation. For example, the priority value of the HARQ feedbackinformation may be a same as a largest priority value among at least onepriority value related to the first SL resource.

Based on an embodiment of the present disclosure, a first deviceconfigured to perform wireless communication may be provided. Forexample, the first device may comprise: one or more memories storinginstructions; one or more transceivers; and one or more processorsconnected to the one or more memories and the one or more transceivers.For example, the one or more processors may execute the instructions to:receive, from a base station, information related to a physical uplinkcontrol channel (PUCCH) resource for reporting hybrid automatic repeatrequest (HARQ) feedback information and information related to a firstsidelink (SL) resource; generate the HARQ feedback information based onfirst SL transmission being not performed on the first SL resource bythe first device; and determine a priority value of the HARQ feedbackinformation. For example, the priority value of the HARQ feedbackinformation may be a same as a largest priority value among at least onepriority value related to the first SL resource.

Based on an embodiment of the present disclosure, an apparatusconfigured to control a first user equipment (UE) performing wirelesscommunication may be provided. For example, the apparatus may comprise:one or more processors; and one or more memories operably connected tothe one or more processors and storing instructions. For example, theone or more processors may execute the instructions to: receive, from abase station, information related to a physical uplink control channel(PUCCH) resource for reporting hybrid automatic repeat request (HARQ)feedback information and information related to a first sidelink (SL)resource; generate the HARQ feedback information based on first SLtransmission being not performed on the first SL resource by the firstUE; and determine a priority value of the HARQ feedback information. Forexample, the priority value of the HARQ feedback information may be asame as a largest priority value among at least one priority valuerelated to the first SL resource.

Based on an embodiment of the present disclosure, a non-transitorycomputer-readable storage medium storing instructions may be provided.For example, the instructions, when executed, may cause a first deviceto: receive, from a base station, information related to a physicaluplink control channel (PUCCH) resource for reporting hybrid automaticrepeat request (HARQ) feedback information and information related to afirst sidelink (SL) resource; generate the HARQ feedback informationbased on first SL transmission being not performed on the first SLresource by the first device; and determine a priority value of the HARQfeedback information. For example, the priority value of the HARQfeedback information may be a same as a largest priority value among atleast one priority value related to the first SL resource.

FIG. 27 shows a method for a base station to perform wirelesscommunication, based on an embodiment of the present disclosure. Theembodiment of FIG. 27 may be combined with various embodiments of thepresent disclosure.

Referring to FIG. 27 , in step S2710, the base station may transmit, toa first device, information related to a physical uplink control channel(PUCCH) resource and information related to a first sidelink (SL)resource for reporting hybrid automatic repeat request (HARQ) feedbackinformation. In step S2720, the base station may receive, from the firstdevice through the PUCCH resource, the HARQ feedback information basedon first SL transmission being not performed on the first SL resource bythe first device. For example, a priority value of the HARQ feedbackinformation may be a same as a largest priority value among at least onepriority value related to the first SL resource.

The proposed method can be applied to the device(s) described in thepresent disclosure. First, the processor 202 of the base station 200 maycontrol the transceiver 206 to transmit, to a first device, informationrelated to a physical uplink control channel (PUCCH) resource andinformation related to a first sidelink (SL) resource for reportinghybrid automatic repeat request (HARQ) feedback information. Inaddition, the processor 202 of the base station 200 may control thetransceiver 206 to receive, from the first device through the PUCCHresource, the HARQ feedback information based on first SL transmissionbeing not performed on the first SL resource by the first device. Forexample, a priority value of the HARQ feedback information may be a sameas a largest priority value among at least one priority value related tothe first SL resource.

Based on an embodiment of the present disclosure, a base stationconfigured to perform wireless communication may be provided. Forexample, the base station may comprise: one or more memories storinginstructions; one or more transceivers; and one or more processorsconnected to the one or more memories and the one or more transceivers.For example, the one or more processors may execute the instructions to:transmit, to a first device, information related to a physical uplinkcontrol channel (PUCCH) resource and information related to a firstsidelink (SL) resource for reporting hybrid automatic repeat request(HARQ) feedback information; and receive, from the first device throughthe PUCCH resource, the HARQ feedback information based on first SLtransmission being not performed on the first SL resource by the firstdevice. For example, a priority value of the HARQ feedback informationmay be a same as a largest priority value among at least one priorityvalue related to the first SL resource.

Based on an embodiment of the present disclosure, an apparatusconfigured to control a base station performing wireless communicationmay be provided. For example, the apparatus may comprise: one or moreprocessors; and one or more memories operably connected to the one ormore processors and storing instructions. For example, the one or moreprocessors may execute the instructions to: transmit, to a first userequipment (UE), information related to a physical uplink control channel(PUCCH) resource and information related to a first sidelink (SL)resource for reporting hybrid automatic repeat request (HARQ) feedbackinformation; and receive, from the first UE through the PUCCH resource,the HARQ feedback information based on first SL transmission being notperformed on the first SL resource by the first UE. For example, apriority value of the HARQ feedback information may be a same as alargest priority value among at least one priority value related to thefirst SL resource.

Based on an embodiment of the present disclosure, a non-transitorycomputer-readable storage medium storing instructions may be provided.For example, the instructions, when executed, may cause a base stationto: transmit, to a first device, information related to a physicaluplink control channel (PUCCH) resource and information related to afirst sidelink (SL) resource for reporting hybrid automatic repeatrequest (HARQ) feedback information; and receive, from the first devicethrough the PUCCH resource, the HARQ feedback information based on firstSL transmission being not performed on the first SL resource by thefirst device. For example, a priority value of the HARQ feedbackinformation may be a same as a largest priority value among at least onepriority value related to the first SL resource.

Various embodiments of the present disclosure may be combined with eachother.

Hereinafter, device(s) to which various embodiments of the presentdisclosure can be applied will be described.

The various descriptions, functions, procedures, proposals, methods,and/or operational flowcharts of the present disclosure described inthis document may be applied to, without being limited to, a variety offields requiring wireless communication/connection (e.g., 5G) betweendevices.

Hereinafter, a description will be given in more detail with referenceto the drawings. In the following drawings/description, the samereference symbols may denote the same or corresponding hardware blocks,software blocks, or functional blocks unless described otherwise.

FIG. 28 shows a communication system 1, based on an embodiment of thepresent disclosure.

Referring to FIG. 28 , a communication system 1 to which variousembodiments of the present disclosure are applied includes wirelessdevices, Base Stations (BSs), and a network. Herein, the wirelessdevices represent devices performing communication using Radio AccessTechnology (RAT) (e.g., 5G New RAT (NR)) or Long-Term Evolution (LTE))and may be referred to as communication/radio/5G devices. The wirelessdevices may include, without being limited to, a robot 100 a, vehicles100 b-1 and 100 b-2, an eXtended Reality (XR) device 100 c, a hand-helddevice 100 d, a home appliance 100 e, an Internet of Things (IoT) device100 f, and an Artificial Intelligence (AI) device/server 400. Forexample, the vehicles may include a vehicle having a wirelesscommunication function, an autonomous vehicle, and a vehicle capable ofperforming communication between vehicles. Herein, the vehicles mayinclude an Unmanned Aerial Vehicle (UAV) (e.g., a drone). The XR devicemay include an Augmented Reality (AR)/Virtual Reality (VR)/Mixed Reality(MR) device and may be implemented in the form of a Head-Mounted Device(HMD), a Head-Up Display (HUD) mounted in a vehicle, a television, asmartphone, a computer, a wearable device, a home appliance device, adigital signage, a vehicle, a robot, etc. The hand-held device mayinclude a smartphone, a smartpad, a wearable device (e.g., a smartwatchor a smartglasses), and a computer (e.g., a notebook). The homeappliance may include a TV, a refrigerator, and a washing machine. TheIoT device may include a sensor and a smartmeter. For example, the BSsand the network may be implemented as wireless devices and a specificwireless device 200 a may operate as a BS/network node with respect toother wireless devices.

Here, wireless communication technology implemented in wireless devices100 a to 100 f of the present disclosure may include Narrowband Internetof Things for low-power communication in addition to LTE, NR, and 6G. Inthis case, for example, NB-IoT technology may be an example of Low PowerWide Area Network (LPWAN) technology and may be implemented as standardssuch as LTE Cat NB1, and/or LTE Cat NB2, and is not limited to the namedescribed above. Additionally or alternatively, the wirelesscommunication technology implemented in the wireless devices 100 a to100 f of the present disclosure may perform communication based on LTE-Mtechnology. In this case, as an example, the LTE-M technology may be anexample of the LPWAN and may be called by various names includingenhanced Machine Type Communication (eMTC), and the like. For example,the LTE-M technology may be implemented as at least any one of variousstandards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTEnon-Bandwidth Limited (non-BL), 5) LTE-MTC, 6) LTE Machine TypeCommunication, and/or 7) LTE M, and is not limited to the name describedabove. Additionally or alternatively, the wireless communicationtechnology implemented in the wireless devices 100 a to 100 f of thepresent disclosure may include at least one of Bluetooth, Low Power WideArea Network (LPWAN), and ZigBee considering the low-powercommunication, and is not limited to the name described above. As anexample, the ZigBee technology may generate personal area networks (PAN)related to small/low-power digital communication based on variousstandards including IEEE 802.15.4, and the like, and may be called byvarious names.

The wireless devices 100 a to 100 f may be connected to the network 300via the BSs 200. An AI technology may be applied to the wireless devices100 a to 100 f and the wireless devices 100 a to 100 f may be connectedto the AI server 400 via the network 300. The network 300 may beconfigured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g.,NR) network. Although the wireless devices 100 a to 100 f maycommunicate with each other through the BSs 200/network 300, thewireless devices 100 a to 100 f may perform direct communication (e.g.,sidelink communication) with each other without passing through theBSs/network. For example, the vehicles 100 b-1 and 100 b-2 may performdirect communication (e.g. Vehicle-to-Vehicle(V2V)/Vehicle-to-everything (V2X) communication). The IoT device (e.g.,a sensor) may perform direct communication with other IoT devices (e.g.,sensors) or other wireless devices 100 a to 100 f.

Wireless communication/connections 150 a, 150 b, or 150 c may beestablished between the wireless devices 100 a to 100 f/BS 200, or BS200/BS 200. Herein, the wireless communication/connections may beestablished through various RATs (e.g., 5G NR) such as uplink/downlinkcommunication 150 a, sidelink communication 150 b (or, D2Dcommunication), or inter BS communication (e.g., relay, IntegratedAccess Backhaul (IAB)). The wireless devices and the BSs/the wirelessdevices may transmit/receive radio signals to/from each other throughthe wireless communication/connections 150 a and 150 b. For example, thewireless communication/connections 150 a and 150 b may transmit/receivesignals through various physical channels. To this end, at least a partof various configuration information configuring processes, varioussignal processing processes (e.g., channel encoding/decoding,modulation/demodulation, and resource mapping/demapping), and resourceallocating processes, for transmitting/receiving radio signals, may beperformed based on the various proposals of the present disclosure.

FIG. 29 shows wireless devices, based on an embodiment of the presentdisclosure.

Referring to FIG. 29 , a first wireless device 100 and a second wirelessdevice 200 may transmit radio signals through a variety of RATs (e.g.,LTE and NR). Herein, {the first wireless device 100 and the secondwireless device 200} may correspond to {the wireless device 100 x andthe BS 200} and/or {the wireless device 100 x and the wireless device100 x} of FIG. 28 .

The first wireless device 100 may include one or more processors 102 andone or more memories 104 and additionally further include one or moretransceivers 106 and/or one or more antennas 108. The processor(s) 102may control the memory(s) 104 and/or the transceiver(s) 106 and may beconfigured to implement the descriptions, functions, procedures,proposals, methods, and/or operational flowcharts disclosed in thisdocument. For example, the processor(s) 102 may process informationwithin the memory(s) 104 to generate first information/signals and thentransmit radio signals including the first information/signals throughthe transceiver(s) 106. The processor(s) 102 may receive radio signalsincluding second information/signals through the transceiver 106 andthen store information obtained by processing the secondinformation/signals in the memory(s) 104. The memory(s) 104 may beconnected to the processor(s) 102 and may store a variety of informationrelated to operations of the processor(s) 102. For example, thememory(s) 104 may store software code including commands for performinga part or the entirety of processes controlled by the processor(s) 102or for performing the descriptions, functions, procedures, proposals,methods, and/or operational flowcharts disclosed in this document.Herein, the processor(s) 102 and the memory(s) 104 may be a part of acommunication modem/circuit/chip designed to implement RAT (e.g., LTE orNR). The transceiver(s) 106 may be connected to the processor(s) 102 andtransmit and/or receive radio signals through one or more antennas 108.Each of the transceiver(s) 106 may include a transmitter and/or areceiver. The transceiver(s) 106 may be interchangeably used with RadioFrequency (RF) unit(s). In the present disclosure, the wireless devicemay represent a communication modem/circuit/chip.

The second wireless device 200 may include one or more processors 202and one or more memories 204 and additionally further include one ormore transceivers 206 and/or one or more antennas 208. The processor(s)202 may control the memory(s) 204 and/or the transceiver(s) 206 and maybe configured to implement the descriptions, functions, procedures,proposals, methods, and/or operational flowcharts disclosed in thisdocument. For example, the processor(s) 202 may process informationwithin the memory(s) 204 to generate third information/signals and thentransmit radio signals including the third information/signals throughthe transceiver(s) 206. The processor(s) 202 may receive radio signalsincluding fourth information/signals through the transceiver(s) 106 andthen store information obtained by processing the fourthinformation/signals in the memory(s) 204. The memory(s) 204 may beconnected to the processor(s) 202 and may store a variety of informationrelated to operations of the processor(s) 202. For example, thememory(s) 204 may store software code including commands for performinga part or the entirety of processes controlled by the processor(s) 202or for performing the descriptions, functions, procedures, proposals,methods, and/or operational flowcharts disclosed in this document.Herein, the processor(s) 202 and the memory(s) 204 may be a part of acommunication modem/circuit/chip designed to implement RAT (e.g., LTE orNR). The transceiver(s) 206 may be connected to the processor(s) 202 andtransmit and/or receive radio signals through one or more antennas 208.Each of the transceiver(s) 206 may include a transmitter and/or areceiver. The transceiver(s) 206 may be interchangeably used with RFunit(s). In the present disclosure, the wireless device may represent acommunication modem/circuit/chip.

Hereinafter, hardware elements of the wireless devices 100 and 200 willbe described more specifically. One or more protocol layers may beimplemented by, without being limited to, one or more processors 102 and202. For example, the one or more processors 102 and 202 may implementone or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP,RRC, and SDAP). The one or more processors 102 and 202 may generate oneor more Protocol Data Units (PDUs) and/or one or more Service Data Unit(SDUs) according to the descriptions, functions, procedures, proposals,methods, and/or operational flowcharts disclosed in this document. Theone or more processors 102 and 202 may generate messages, controlinformation, data, or information according to the descriptions,functions, procedures, proposals, methods, and/or operational flowchartsdisclosed in this document. The one or more processors 102 and 202 maygenerate signals (e.g., baseband signals) including PDUs, SDUs,messages, control information, data, or information according to thedescriptions, functions, procedures, proposals, methods, and/oroperational flowcharts disclosed in this document and provide thegenerated signals to the one or more transceivers 106 and 206. The oneor more processors 102 and 202 may receive the signals (e.g., basebandsignals) from the one or more transceivers 106 and 206 and acquire thePDUs, SDUs, messages, control information, data, or informationaccording to the descriptions, functions, procedures, proposals,methods, and/or operational flowcharts disclosed in this document.

The one or more processors 102 and 202 may be referred to ascontrollers, microcontrollers, microprocessors, or microcomputers. Theone or more processors 102 and 202 may be implemented by hardware,firmware, software, or a combination thereof. As an example, one or moreApplication Specific Integrated Circuits (ASICs), one or more DigitalSignal Processors (DSPs), one or more Digital Signal Processing Devices(DSPDs), one or more Programmable Logic Devices (PLDs), or one or moreField Programmable Gate Arrays (FPGAs) may be included in the one ormore processors 102 and 202. The descriptions, functions, procedures,proposals, methods, and/or operational flowcharts disclosed in thisdocument may be implemented using firmware or software and the firmwareor software may be configured to include the modules, procedures, orfunctions. Firmware or software configured to perform the descriptions,functions, procedures, proposals, methods, and/or operational flowchartsdisclosed in this document may be included in the one or more processors102 and 202 or stored in the one or more memories 104 and 204 so as tobe driven by the one or more processors 102 and 202. The descriptions,functions, procedures, proposals, methods, and/or operational flowchartsdisclosed in this document may be implemented using firmware or softwarein the form of code, commands, and/or a set of commands.

The one or more memories 104 and 204 may be connected to the one or moreprocessors 102 and 202 and store various types of data, signals,messages, information, programs, code, instructions, and/or commands.The one or more memories 104 and 204 may be configured by Read-OnlyMemories (ROMs), Random Access Memories (RAMs), Electrically ErasableProgrammable Read-Only Memories (EPROMs), flash memories, hard drives,registers, cash memories, computer-readable storage media, and/orcombinations thereof. The one or more memories 104 and 204 may belocated at the interior and/or exterior of the one or more processors102 and 202. The one or more memories 104 and 204 may be connected tothe one or more processors 102 and 202 through various technologies suchas wired or wireless connection.

The one or more transceivers 106 and 206 may transmit user data, controlinformation, and/or radio signals/channels, mentioned in the methodsand/or operational flowcharts of this document, to one or more otherdevices. The one or more transceivers 106 and 206 may receive user data,control information, and/or radio signals/channels, mentioned in thedescriptions, functions, procedures, proposals, methods, and/oroperational flowcharts disclosed in this document, from one or moreother devices. For example, the one or more transceivers 106 and 206 maybe connected to the one or more processors 102 and 202 and transmit andreceive radio signals. For example, the one or more processors 102 and202 may perform control so that the one or more transceivers 106 and 206may transmit user data, control information, or radio signals to one ormore other devices. The one or more processors 102 and 202 may performcontrol so that the one or more transceivers 106 and 206 may receiveuser data, control information, or radio signals from one or more otherdevices. The one or more transceivers 106 and 206 may be connected tothe one or more antennas 108 and 208 and the one or more transceivers106 and 206 may be configured to transmit and receive user data, controlinformation, and/or radio signals/channels, mentioned in thedescriptions, functions, procedures, proposals, methods, and/oroperational flowcharts disclosed in this document, through the one ormore antennas 108 and 208. In this document, the one or more antennasmay be a plurality of physical antennas or a plurality of logicalantennas (e.g., antenna ports). The one or more transceivers 106 and 206may convert received radio signals/channels etc. from RF band signalsinto baseband signals in order to process received user data, controlinformation, radio signals/channels, etc. using the one or moreprocessors 102 and 202. The one or more transceivers 106 and 206 mayconvert the user data, control information, radio signals/channels, etc.processed using the one or more processors 102 and 202 from the baseband signals into the RF band signals. To this end, the one or moretransceivers 106 and 206 may include (analog) oscillators and/orfilters.

FIG. 30 shows a signal process circuit for a transmission signal, basedon an embodiment of the present disclosure.

Referring to FIG. 30 , a signal processing circuit 1000 may includescramblers 1010, modulators 1020, a layer mapper 1030, a precoder 1040,resource mappers 1050, and signal generators 1060. An operation/functionof FIG. 30 may be performed, without being limited to, the processors102 and 202 and/or the transceivers 106 and 206 of FIG. 29 . Hardwareelements of FIG. 30 may be implemented by the processors 102 and 202and/or the transceivers 106 and 206 of FIG. 29 . For example, blocks1010 to 1060 may be implemented by the processors 102 and 202 of FIG. 29. Alternatively, the blocks 1010 to 1050 may be implemented by theprocessors 102 and 202 of FIG. 29 and the block 1060 may be implementedby the transceivers 106 and 206 of FIG. 29 .

Codewords may be converted into radio signals via the signal processingcircuit 1000 of FIG. 30 . Herein, the codewords are encoded bitsequences of information blocks. The information blocks may includetransport blocks (e.g., a UL-SCH transport block, a DL-SCH transportblock). The radio signals may be transmitted through various physicalchannels (e.g., a PUSCH and a PDSCH).

Specifically, the codewords may be converted into scrambled bitsequences by the scramblers 1010. Scramble sequences used for scramblingmay be generated based on an initialization value, and theinitialization value may include ID information of a wireless device.The scrambled bit sequences may be modulated to modulation symbolsequences by the modulators 1020. A modulation scheme may includepi/2-Binary Phase Shift Keying (pi/2-BPSK), m-Phase Shift Keying(m-PSK), and m-Quadrature Amplitude Modulation (m-QAM). Complexmodulation symbol sequences may be mapped to one or more transportlayers by the layer mapper 1030. Modulation symbols of each transportlayer may be mapped (precoded) to corresponding antenna port(s) by theprecoder 1040. Outputs z of the precoder 1040 may be obtained bymultiplying outputs y of the layer mapper 1030 by an N*M precodingmatrix W. Herein, N is the number of antenna ports and M is the numberof transport layers. The precoder 1040 may perform precoding afterperforming transform precoding (e.g., DFT) for complex modulationsymbols. Alternatively, the precoder 1040 may perform precoding withoutperforming transform precoding.

The resource mappers 1050 may map modulation symbols of each antennaport to time-frequency resources. The time-frequency resources mayinclude a plurality of symbols (e.g., a CP-OFDMA symbols and DFT-s-OFDMAsymbols) in the time domain and a plurality of subcarriers in thefrequency domain. The signal generators 1060 may generate radio signalsfrom the mapped modulation symbols and the generated radio signals maybe transmitted to other devices through each antenna. For this purpose,the signal generators 1060 may include Inverse Fast Fourier Transform(IFFT) modules, Cyclic Prefix (CP) inserters, Digital-to-AnalogConverters (DACs), and frequency up-converters.

Signal processing procedures for a signal received in the wirelessdevice may be configured in a reverse manner of the signal processingprocedures 1010 to 1060 of FIG. 30 . For example, the wireless devices(e.g., 100 and 200 of FIG. 29 ) may receive radio signals from theexterior through the antenna ports/transceivers. The received radiosignals may be converted into baseband signals through signal restorers.To this end, the signal restorers may include frequency downlinkconverters, Analog-to-Digital Converters (ADCs), CP remover, and FastFourier Transform (FFT) modules. Next, the baseband signals may berestored to codewords through a resource demapping procedure, apostcoding procedure, a demodulation processor, and a descramblingprocedure. The codewords may be restored to original information blocksthrough decoding. Therefore, a signal processing circuit (notillustrated) for a reception signal may include signal restorers,resource demappers, a postcoder, demodulators, descramblers, anddecoders.

FIG. 31 shows another example of a wireless device, based on anembodiment of the present disclosure. The wireless device may beimplemented in various forms according to a use-case/service (refer toFIG. 28 ).

Referring to FIG. 31 , wireless devices 100 and 200 may correspond tothe wireless devices 100 and 200 of FIG. 29 and may be configured byvarious elements, components, units/portions, and/or modules. Forexample, each of the wireless devices 100 and 200 may include acommunication unit 110, a control unit 120, a memory unit 130, andadditional components 140. The communication unit may include acommunication circuit 112 and transceiver(s) 114. For example, thecommunication circuit 112 may include the one or more processors 102 and202 and/or the one or more memories 104 and 204 of FIG. 29 . Forexample, the transceiver(s) 114 may include the one or more transceivers106 and 206 and/or the one or more antennas 108 and 208 of FIG. 29 . Thecontrol unit 120 is electrically connected to the communication unit110, the memory 130, and the additional components 140 and controlsoverall operation of the wireless devices. For example, the control unit120 may control an electric/mechanical operation of the wireless devicebased on programs/code/commands/information stored in the memory unit130. The control unit 120 may transmit the information stored in thememory unit 130 to the exterior (e.g., other communication devices) viathe communication unit 110 through a wireless/wired interface or store,in the memory unit 130, information received through the wireless/wiredinterface from the exterior (e.g., other communication devices) via thecommunication unit 110.

The additional components 140 may be variously configured according totypes of wireless devices. For example, the additional components 140may include at least one of a power unit/battery, input/output (I/O)unit, a driving unit, and a computing unit. The wireless device may beimplemented in the form of, without being limited to, the robot (100 aof FIG. 28 ), the vehicles (100 b-1 and 100 b-2 of FIG. 28 ), the XRdevice (100 c of FIG. 28 ), the hand-held device (100 d of FIG. 28 ),the home appliance (100 e of FIG. 28 ), the IoT device (100 f of FIG. 28), a digital broadcast terminal, a hologram device, a public safetydevice, an MTC device, a medicine device, a fintech device (or a financedevice), a security device, a climate/environment device, the AIserver/device (400 of FIG. 28 ), the BSs (200 of FIG. 28 ), a networknode, etc. The wireless device may be used in a mobile or fixed placeaccording to a use-example/service.

In FIG. 31 , the entirety of the various elements, components,units/portions, and/or modules in the wireless devices 100 and 200 maybe connected to each other through a wired interface or at least a partthereof may be wirelessly connected through the communication unit 110.For example, in each of the wireless devices 100 and 200, the controlunit 120 and the communication unit 110 may be connected by wire and thecontrol unit 120 and first units (e.g., 130 and 140) may be wirelesslyconnected through the communication unit 110. Each element, component,unit/portion, and/or module within the wireless devices 100 and 200 mayfurther include one or more elements. For example, the control unit 120may be configured by a set of one or more processors. As an example, thecontrol unit 120 may be configured by a set of a communication controlprocessor, an application processor, an Electronic Control Unit (ECU), agraphical processing unit, and a memory control processor. As anotherexample, the memory 130 may be configured by a Random Access Memory(RAM), a Dynamic RAM (DRAM), a Read Only Memory (ROM)), a flash memory,a volatile memory, a non-volatile memory, and/or a combination thereof.

Hereinafter, an example of implementing FIG. 31 will be described indetail with reference to the drawings.

FIG. 32 shows a hand-held device, based on an embodiment of the presentdisclosure. The hand-held device may include a smartphone, a smartpad, awearable device (e.g., a smartwatch or a smartglasses), or a portablecomputer (e.g., a notebook). The hand-held device may be referred to asa mobile station (MS), a user terminal (UT), a Mobile Subscriber Station(MSS), a Subscriber Station (SS), an Advanced Mobile Station (AMS), or aWireless Terminal (WT).

Referring to FIG. 32 , a hand-held device 100 may include an antennaunit 108, a communication unit 110, a control unit 120, a memory unit130, a power supply unit 140 a, an interface unit 140 b, and an I/O unit140 c. The antenna unit 108 may be configured as a part of thecommunication unit 110. Blocks 110 to 130/140 a to 140 c correspond tothe blocks 110 to 130/140 of FIG. 31 , respectively.

The communication unit 110 may transmit and receive signals (e.g., dataand control signals) to and from other wireless devices or BSs. Thecontrol unit 120 may perform various operations by controllingconstituent elements of the hand-held device 100. The control unit 120may include an Application Processor (AP). The memory unit 130 may storedata/parameters/programs/code/commands needed to drive the hand-helddevice 100. The memory unit 130 may store input/output data/information.The power supply unit 140 a may supply power to the hand-held device 100and include a wired/wireless charging circuit, a battery, etc. Theinterface unit 140 b may support connection of the hand-held device 100to other external devices. The interface unit 140 b may include variousports (e.g., an audio I/O port and a video I/O port) for connection withexternal devices. The I/O unit 140 c may input or output videoinformation/signals, audio information/signals, data, and/or informationinput by a user. The I/O unit 140 c may include a camera, a microphone,a user input unit, a display unit 140 d, a speaker, and/or a hapticmodule.

As an example, in the case of data communication, the I/O unit 140 c mayacquire information/signals (e.g., touch, text, voice, images, or video)input by a user and the acquired information/signals may be stored inthe memory unit 130. The communication unit 110 may convert theinformation/signals stored in the memory into radio signals and transmitthe converted radio signals to other wireless devices directly or to aBS. The communication unit 110 may receive radio signals from otherwireless devices or the BS and then restore the received radio signalsinto original information/signals. The restored information/signals maybe stored in the memory unit 130 and may be output as various types(e.g., text, voice, images, video, or haptic) through the I/O unit 140c.

FIG. 33 shows a vehicle or an autonomous vehicle, based on an embodimentof the present disclosure. The vehicle or autonomous vehicle may beimplemented by a mobile robot, a car, a train, a manned/unmanned AerialVehicle (AV), a ship, etc.

Referring to FIG. 33 , a vehicle or autonomous vehicle 100 may includean antenna unit 108, a communication unit 110, a control unit 120, adriving unit 140 a, a power supply unit 140 b, a sensor unit 140 c, andan autonomous driving unit 140 d. The antenna unit 108 may be configuredas a part of the communication unit 110. The blocks 110/130/140 a to 140d correspond to the blocks 110/130/140 of FIG. 31 , respectively.

The communication unit 110 may transmit and receive signals (e.g., dataand control signals) to and from external devices such as othervehicles, BSs (e.g., gNBs and road side units), and servers. The controlunit 120 may perform various operations by controlling elements of thevehicle or the autonomous vehicle 100. The control unit 120 may includean Electronic Control Unit (ECU). The driving unit 140 a may cause thevehicle or the autonomous vehicle 100 to drive on a road. The drivingunit 140 a may include an engine, a motor, a powertrain, a wheel, abrake, a steering device, etc. The power supply unit 140 b may supplypower to the vehicle or the autonomous vehicle 100 and include awired/wireless charging circuit, a battery, etc. The sensor unit 140 cmay acquire a vehicle state, ambient environment information, userinformation, etc. The sensor unit 140 c may include an InertialMeasurement Unit (IMU) sensor, a collision sensor, a wheel sensor, aspeed sensor, a slope sensor, a weight sensor, a heading sensor, aposition module, a vehicle forward/backward sensor, a battery sensor, afuel sensor, a tire sensor, a steering sensor, a temperature sensor, ahumidity sensor, an ultrasonic sensor, an illumination sensor, a pedalposition sensor, etc. The autonomous driving unit 140 d may implementtechnology for maintaining a lane on which a vehicle is driving,technology for automatically adjusting speed, such as adaptive cruisecontrol, technology for autonomously driving along a determined path,technology for driving by automatically setting a path if a destinationis set, and the like.

For example, the communication unit 110 may receive map data, trafficinformation data, etc. from an external server. The autonomous drivingunit 140 d may generate an autonomous driving path and a driving planfrom the obtained data. The control unit 120 may control the drivingunit 140 a such that the vehicle or the autonomous vehicle 100 may movealong the autonomous driving path according to the driving plan (e.g.,speed/direction control). In the middle of autonomous driving, thecommunication unit 110 may aperiodically/periodically acquire recenttraffic information data from the external server and acquiresurrounding traffic information data from neighboring vehicles. In themiddle of autonomous driving, the sensor unit 140 c may obtain a vehiclestate and/or surrounding environment information. The autonomous drivingunit 140 d may update the autonomous driving path and the driving planbased on the newly obtained data/information. The communication unit 110may transfer information about a vehicle position, the autonomousdriving path, and/or the driving plan to the external server. Theexternal server may predict traffic information data using AItechnology, etc., based on the information collected from vehicles orautonomous vehicles and provide the predicted traffic information datato the vehicles or the autonomous vehicles.

Claims in the present description can be combined in a various way. Forinstance, technical features in method claims of the present descriptioncan be combined to be implemented or performed in an apparatus, andtechnical features in apparatus claims can be combined to be implementedor performed in a method. Further, technical features in method claim(s)and apparatus claim(s) can be combined to be implemented or performed inan apparatus. Further, technical features in method claim(s) andapparatus claim(s) can be combined to be implemented or performed in amethod.

What is claimed is:
 1. A method for performing wireless communication bya first device, the method comprising: transmitting a plurality ofphysical sidelink control channels (PSCCHs) and a plurality of physicalsidelink shared channels (PSSCHs), each being related to a correspondingone of the PSCCHs; determining at least one physical sidelink feedbackchannel (PSFCH) resource related to the plurality of PSSCHs; obtainingsidelink (SL) hybrid automatic repeat request (HARQ) feedbackinformation related to each of the plurality of PSSCHs; and determininga priority value of a physical uplink control channel (PUCCH), based onthe SL HARQ feedback information, wherein the priority value of thePUCCH is determined to be a smallest priority value among a plurality ofpriority values corresponding to the plurality of PSSCHs, and whetherthe PUCCH is or is not transmitted is based on the determined priorityvalue of the PUCCH.
 2. The method of claim 1, wherein the priority valueof the PUCCH transmission is a smallest value among a plurality ofpriority values of the SL HARQ feedback information.
 3. The method ofclaim 2, further comprising: determining the plurality of priorityvalues of the SL HARQ feedback information, wherein the plurality ofpriority values of the SL HARQ feedback information are the same asplurality of priority values related to transmission of the plurality ofPSSCHs.
 4. The method of claim 3, wherein the plurality of priorityvalues related to transmission of the plurality of PSSCHs are includedin sidelink control information (SCI) transmitted through the pluralityof PSCCHs.
 5. The method of claim 1, further comprising: performing thePUCCH transmission or a SL transmission based on the priority value ofthe PUCCH transmission and a priority value of the SL transmission,wherein the PUCCH transmission and the SL transmission overlap in a timedomain.
 6. The method of claim 5, wherein, based on the priority valueof the PUCCH transmission being smaller than the priority value of theSL transmission, the PUCCH is transmitted to the base station.
 7. Themethod of claim 5, wherein, based on (i) the priority value of the PUCCHtransmission being smaller than the priority value of the SLtransmission and (ii) a sum of power related to the PUCCH transmissionand power related to the SL transmission exceeding a maximum transmitpower of the first device, the power related to the SL transmission isreduced such that the sum does not exceed the maximum transmit power ofthe first device.
 8. The method of claim 5, wherein, based on thepriority value of the PUCCH transmission being larger than the priorityvalue of the SL transmission, the SL transmission is performed.
 9. Themethod of claim 5, wherein, based on (i) the priority value of the PUCCHtransmission being larger than the priority value of the SLtransmission, and (ii) a sum of power related to the PUCCH transmissionand power related to the SL transmission exceeding a maximum transmitpower of the first device, the power related to the PUCCH transmissionis reduced such that the sum does not exceed the maximum transmit powerof the first device.
 10. The method of claim 1, further comprising:transmitting a physical random access channel (PRACH) to the basestation.
 11. The method of claim 10, wherein a priority related totransmission of the PRACH is higher than a priority related totransmission of a PSFCH.
 12. The method of claim 10, wherein a priorityrelated to transmission of the PRACH is higher than a priority relatedto transmission of a sidelink-synchronization signal block (S-SSB). 13.The method of claim 1, further comprising: receiving information relatedto a SL resource from the base station.
 14. A first device configured toperform wireless communication, the first device comprising: one or morememories storing instructions; one or more transceivers; and one or moreprocessors connected to the one or more memories and the one or moretransceivers, wherein the one or more processors execute theinstructions to: transmit a plurality of physical sidelink controlchannels (PSCCHs) and a plurality of physical sidelink shared channels(PSSCHs), each being related to a corresponding one of the PSCCHs;determine at least one physical sidelink feedback channel (PSFCH)resource related to the plurality of PSSCHs; obtain sidelink (SL) hybridautomatic repeat request (HARQ) feedback information related to each ofthe plurality of PSSCHs; and determine a priority value of a physicaluplink control channel (PUCCH), based on SL HARQ feedback information,wherein the priority value of the PUCCH is determined to be a smallestpriority value among a plurality of priority values corresponding to theplurality of PSSCHs, and whether the PUCCH is or is not transmitted isbased on the determined priority value of the PUCCH.
 15. The firstdevice of claim 14, wherein the priority value of the PUCCH transmissionis a smallest value among a plurality of priority values of the SL HARQfeedback information.
 16. The first device of claim 15, wherein the oneor more processors further execute the instructions to determine theplurality of priority values of the SL HARQ feedback information, andwherein the plurality of priority values of the SL HARQ feedbackinformation are the same as plurality of priority values related totransmission of the plurality of PSSCHs.
 17. The first device of claim16, wherein the plurality of priority values related to transmission ofthe at least one PSSCH is plurality of PSSCHs are included in sidelinkcontrol information (SCI) transmitted through the plurality of PSCCHs.18. The first device of claim 14, wherein the one or more processorsfurther execute the instructions to perform the PUCCH transmission or aSL transmission based on the priority value of the PUCCH transmissionand a priority value of the SL transmission, wherein the PUCCHtransmission and the SL transmission overlap in a time domain.
 19. Thefirst device of claim 18, wherein, based on the priority value of thePUCCH transmission being smaller than the priority value of the SLtransmission, the PUCCH is transmitted to the base station.
 20. Anapparatus configured to control a first user equipment (UE) performingwireless communication, the apparatus comprising: one or moreprocessors; and one or more memories operably connected to the one ormore processors and storing instructions, wherein the one or moreprocessors execute the instructions to: transmit a plurality of physicalsidelink control channels (PSCCHs) and a plurality of physical sidelinkshared channels (PSSCHs), each being related to a corresponding one ofthe PSCCHs; determine at least one physical sidelink feedback channel(PSFCH) resource related to the plurality of PSSCHs; obtain sidelink(SL) hybrid automatic repeat request (HARQ) feedback information relatedto each of the plurality of PSSCHs; and determine a priority value of aphysical uplink control channel (PUCCH), based on SL HARQ feedbackinformation, wherein the priority value of the PUCCH is determined to bea smallest priority value among a plurality of priority valuescorresponding to the plurality of PSSCHs, and whether the PUCCH is or isnot transmitted is based on the determined priority value of the PUCCH.